diff --git a/static/css/daw.css b/static/css/daw.css
index cb2090e9..d015e4a0 100644
--- a/static/css/daw.css
+++ b/static/css/daw.css
@@ -5669,3 +5669,39 @@ input, textarea { font-family: inherit; }
   box-shadow: 0 12px 32px rgba(0, 0, 0, 0.42);
 }
 .stem-overflow.open { display: flex; }
+
+/* Help mode. The Guide button in the rail, below Trash; while it is pressed,
+   a ring is drawn around what can be seen of the control being explained,
+   and its box sits beside it. The ring is a layer of its own, so nothing in
+   the page moves and no panel clips it. */
+.rail-guide[aria-pressed="true"] { color: var(--accent); background: var(--panel); }
+/* Only the control being explained is marked, so the screen stays calm; the
+   pill at the bottom says help mode is on. */
+.help-mode .help-target { cursor: help; }
+.help-ring {
+  position: fixed; z-index: 9998; pointer-events: none;
+  border: 2px solid var(--accent); border-radius: var(--radius-sm);
+  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
+}
+.help-pill {
+  position: fixed; z-index: 9999; left: 50%; bottom: 18px; transform: translateX(-50%);
+  max-width: calc(100vw - 32px);
+  background: var(--panel); border: 1px solid var(--accent); border-radius: 999px;
+  padding: 7px 16px; box-shadow: var(--shadow-panel);
+  color: var(--fg); font: 500 12.5px/1.4 var(--font-sans); text-align: center;
+  pointer-events: none;
+}
+.help-tip {
+  position: fixed; z-index: 10000;
+  width: max-content; max-width: min(300px, calc(100vw - 16px));
+  background: var(--panel); border: 1px solid var(--accent); border-radius: var(--radius);
+  padding: 10px 12px; box-shadow: var(--shadow-panel);
+  color: var(--fg-2); font: 400 13px/1.45 var(--font-sans);
+  pointer-events: none;
+}
+.help-tip b { display: block; margin-bottom: 2px; color: var(--fg); font-size: 13.5px; font-weight: 700; }
+.help-tip.long { max-width: min(560px, calc(100vw - 16px)); columns: 2 230px; column-gap: 20px; font-size: 12px; line-height: 1.4; }
+.help-tip.long b { column-span: all; margin-bottom: 6px; }
+.help-tip-h { break-after: avoid; margin-top: 8px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
+.help-tip-row { break-inside: avoid; margin-top: 3px; }
+.help-tip-row span { color: var(--fg); font-weight: 600; }
diff --git a/static/index.html b/static/index.html
index 56490e23..c863c3af 100644
--- a/static/index.html
+++ b/static/index.html
@@ -330,6 +330,15 @@
               <span data-i18n="nav.trash">Trash</span>
               <span class="rail-badge hidden" id="trashBadge" aria-hidden="true"></span>
             </button>
+            <!-- Help mode: the screen explains itself while this is pressed. -->
+            <button class="rail-btn rail-guide" type="button" id="helpModeBtn" aria-pressed="false"
+                    title="Explain the screen" aria-label="Explain the screen"
+                    data-i18n-title="help.button" data-i18n-aria-label="help.button">
+              <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+                <path d="M2 5.5c3-1.3 6-1.3 10 1v13c-4-2.3-7-2.3-10-1z M22 5.5c-3-1.3-6-1.3-10 1v13c4-2.3 7-2.3 10-1z"/>
+              </svg>
+              <span data-i18n="help.railLabel">Guide</span>
+            </button>
             <div style="flex:1"></div>
             <!-- Notifications (#636). In the rail rather than at the end
                  of the top bar: that row is the import and split controls, so
diff --git a/static/js/helpMode.js b/static/js/helpMode.js
new file mode 100644
index 00000000..767b07e8
--- /dev/null
+++ b/static/js/helpMode.js
@@ -0,0 +1,336 @@
+// Help mode: Guide in the rail, below Trash, turns the studio into its own manual.
+// Pointing at any control listed in HELP, or clicking it, outlines it and shows
+// what it does; a pill at the bottom says help mode is on. Clicks are taken by help mode while it is on,
+// so exploring never starts an extraction or deletes a song. Esc or Guide
+// again turns it off.
+//
+// The box is titled with the control's own label, which the rest of the app
+// already translates, and its text comes from the help.* keys in i18n.js.
+
+import { t } from "./i18n.js";
+
+/** Lane controls name their instrument in the text ("Silences the Drums"). */
+const laneName = (el) => el.closest(".mx-row, .lane-header")?.querySelector(".mx-name")?.textContent.trim() || "";
+const chipName = (el) => el.textContent.trim();
+
+// Order matters only where selectors overlap: the first match wins.
+const HELP = [
+  ["#helpModeBtn", "help.helpMode"],
+  [".daw-brand a", "help.website"],
+  ["#uploadFileBtn", "help.upload"],
+  ["#url", "help.search"],
+  ["#stemAllBtn", "help.stemAll"],
+  [".stem-choice[data-stem]", "help.stemChip", chipName],
+  ['.vocal-mode-btn[data-mode="all"]', "help.vocalCombined"],
+  ['.vocal-mode-btn[data-mode="split"]', "help.vocalSplit"],
+  ["#autoSectionsBtn", "help.detectStructure"],
+  ['.daw-panel-toggle[data-panel="analysis"]', "help.analysisToggle"],
+  ['.daw-panel-toggle[data-panel="sections"]', "help.sectionsToggle"],
+  ["#submit", "help.extract"],
+  ["#fav-btn", "help.favorite"],
+  ["#np-details-btn", "help.songDetails"],
+  ["#sidebarCollapseBtn", "help.toggleLibrary"],
+  [".rail-favorites", "help.favorites"],
+  [".rail-library", "help.library"],
+  [".rail-lyrics", "help.lyrics"],
+  [".rail-trash", "help.trash"],
+  [".rail-queue", "help.queue"],
+  ["#notifBtn", "help.notifications"],
+  ["#friendsBtn", "help.recommend"],
+  ["#settingsBtn", "settings"],
+  ["#aboutBtn", "help.about"],
+  ["#catalogSearch", "help.searchLibrary"],
+  ["#newFolderBtn", "help.newFolder"],
+  ["#catalogList .cat-item.in-trash", "help.trashedSong"],
+  ["#catalogList .cat-item", "help.song"],
+  ["#sectionsAddBtn", "help.addSection"],
+  [".mx-fader", "help.volume", laneName],
+  [".lane-key-step.up", "help.laneKeyUp", laneName],
+  [".lane-key-step.down", "help.laneKeyDown", laneName],
+  [".lane-key-value", "help.laneKey", laneName, "help.laneKeyTitle"],
+  [".mx-btn.mute", "help.mute", laneName],
+  [".mx-btn.solo", "help.solo", laneName],
+  [".lane-dl", "help.download", laneName],
+  ["#transport .daw-info-row", "help.songFacts", null, "help.songFactsTitle"],
+  ["#ruler-time", "help.waves", null, "help.wavesTitle"],
+  [".waves-column", "help.waves", null, "help.wavesTitle"],
+  ["#t-stop", "help.stop"],
+  ["#t-play", "help.play"],
+  ["#t-loop", "help.loop"],
+  ["#t-loop-start", "help.loopStart"],
+  ["#t-loop-end", "help.loopEnd"],
+  ["#t-speed-05", "help.speedHalf"],
+  ["#t-speed-075", "help.speedSlow"],
+  ["#t-speed-1", "help.speedNormal"],
+  ["#t-pitch-down", "help.keyDown"],
+  ["#t-pitch-up", "help.keyUp"],
+  ["#t-pitch-reset", "help.keyReset"],
+  ["#t-metro", "help.click"],
+  ["#t-metro-vol-btn", "help.clickVolume"],
+  ["#t-metro-more", "help.clickMore"],
+  ["#t-export-btn", "help.export"],
+];
+
+// Every option in Settings, by tab: the tab and option names are the dialog's
+// own keys, the one-line descriptions are help.set.*.
+const SETTINGS = [
+  ["settings.tab.general", [
+    ["settings.language.title", "help.set.language"],
+    ["settings.maxDuration.title", "help.set.maxDuration"],
+    ["settings.playlistLimit.title", "help.set.playlistLimit"],
+    ["settings.cookies.title", "help.set.cookies"],
+    ["settings.stemsLocation.title", "help.set.stemsLocation"],
+    ["settings.exportsLocation.title", "help.set.exportsLocation"],
+    ["settings.autoDelete.title", "help.set.autoDelete"],
+    ["settings.device.title", "help.set.device"],
+    ["settings.quality.title", "help.set.quality"],
+    ["settings.exportLogs.title", "help.set.exportLogs"],
+    ["settings.resetData.title", "help.set.resetData"],
+  ]],
+  ["settings.tab.songDetails", [
+    ["settings.acoustid.title", "help.set.acoustid"],
+    ["settings.discogs.title", "help.set.discogs"],
+    ["settings.transcribe.title", "help.set.transcribe"],
+  ]],
+  ["settings.tab.network", [
+    ["settings.network.allowTitle", "help.set.network"],
+    ["settings.network.port.title", "help.set.port"],
+  ]],
+  ["settings.tab.export", [
+    ["settings.export.sampleRate.title", "help.set.sampleRate"],
+    ["settings.export.videoQuality.title", "help.set.videoQuality"],
+  ]],
+  ["settings.tab.logs", [[null, "help.set.logs"]]],
+  ["settings.tab.registry", [[null, "help.set.registry"]]],
+];
+
+let on = false;
+let tipEl = null;
+let pillEl = null;
+let ringEl = null;
+let current = null;
+
+export function isHelpModeOn() {
+  return on;
+}
+
+/** The help entry for whatever is under the pointer, and the element it is for. */
+function findEntry(target) {
+  if (!(target instanceof Element)) return null;
+  for (const [sel, key, nameOf, titleKey] of HELP) {
+    const el = target.closest(sel);
+    if (el && isVisible(el)) return { el, key, nameOf, titleKey };
+  }
+  return null;
+}
+
+function isVisible(el) {
+  const r = el.getBoundingClientRect();
+  return r.width > 0 && r.height > 0;
+}
+
+/** The control's own label, which the app already translates. Visible text
+ *  first, unless it is a letter or a sign (M, S, +): a heading that repeats
+ *  "M" teaches nothing, so those take their full label ("Mute Drums"). */
+function titleOf(entry) {
+  const { el } = entry;
+  if (entry.titleKey) return t(entry.titleKey, { name: entry.nameOf ? entry.nameOf(el) : "" });
+  const text = (el.innerText || "").trim().split("\n")[0].trim();
+  if (text.length > 2 && text.length <= 40) return text;
+  return el.getAttribute("aria-label") || el.getAttribute("placeholder") || el.getAttribute("title")
+    || el.querySelector("[aria-label]")?.getAttribute("aria-label") || text;
+}
+
+function fillTip(entry) {
+  tipEl.replaceChildren();
+  tipEl.classList.toggle("long", entry.key === "settings");
+  const title = document.createElement("b");
+  title.textContent = titleOf(entry);
+  tipEl.append(title);
+  if (entry.key !== "settings") {
+    const name = entry.nameOf ? entry.nameOf(entry.el) : "";
+    tipEl.append(t(entry.key, { name }));
+    return;
+  }
+  for (const [tabKey, rows] of SETTINGS) {
+    const h = document.createElement("div");
+    h.className = "help-tip-h";
+    h.textContent = t(tabKey);
+    tipEl.append(h);
+    for (const [nameKey, descKey] of rows) {
+      const row = document.createElement("div");
+      row.className = "help-tip-row";
+      if (nameKey) {
+        const n = document.createElement("span");
+        n.textContent = t(nameKey);
+        row.append(n, " ");
+      }
+      row.append(t(descKey));
+      tipEl.append(row);
+    }
+  }
+}
+
+/**
+ * What the eye sees of a control. A button is often much bigger than the icon
+ * in it (the heart is a 76px tall strip around a 16px icon), and a ring around
+ * the whole box reads as a stray bar. When the content is clearly smaller than
+ * the box, the ring goes around the content instead.
+ */
+function visibleRect(el) {
+  const r = el.getBoundingClientRect();
+  const range = document.createRange();
+  range.selectNodeContents(el);
+  const c = range.getBoundingClientRect();
+  const small = c.width > 0 && c.height > 0 && (c.width < r.width * 0.6 || c.height < r.height * 0.6);
+  // Otherwise the box and its content together: a rail label can hang below
+  // its button's own box, and the ring has to take it in.
+  const box = small ? c : c.width > 0 && c.height > 0
+    ? { left: Math.min(r.left, c.left), top: Math.min(r.top, c.top), right: Math.max(r.right, c.right), bottom: Math.max(r.bottom, c.bottom) }
+    : r;
+  const pad = small ? 6 : 3;
+  const left = box.left - pad, top = box.top - pad, right = box.right + pad, bottom = box.bottom + pad;
+  return { left, top, right, bottom, width: right - left, height: bottom - top };
+}
+
+/** The ring is its own layer over the page, so no panel can clip it. */
+function placeRing(rect) {
+  ringEl.style.left = `${Math.round(rect.left)}px`;
+  ringEl.style.top = `${Math.round(rect.top)}px`;
+  ringEl.style.width = `${Math.round(rect.right - rect.left)}px`;
+  ringEl.style.height = `${Math.round(rect.bottom - rect.top)}px`;
+  ringEl.hidden = false;
+}
+
+/** Beside the control, on whichever side has room, never over it. */
+function placeTip(r) {
+  const tr = tipEl.getBoundingClientRect();
+  const vw = window.innerWidth, vh = window.innerHeight, gap = 10, m = 8;
+  const fits = (x, y) => x >= m && y >= m && x + tr.width <= vw - m && y + tr.height <= vh - m;
+  const cx = Math.min(Math.max(m, r.left + r.width / 2 - tr.width / 2), vw - tr.width - m);
+  const cy = Math.min(Math.max(m, r.top + r.height / 2 - tr.height / 2), vh - tr.height - m);
+  const options = [
+    [r.right + gap, cy],
+    [r.left - gap - tr.width, cy],
+    [cx, r.bottom + gap],
+    [cx, r.top - gap - tr.height],
+  ];
+  // A large area, like the waveforms, takes the box inside its top edge.
+  const [x, y] = options.find(([x, y]) => fits(x, y)) ?? [cx, Math.max(m, Math.min(r.top + 12, vh - tr.height - m))];
+  tipEl.style.left = `${Math.round(x)}px`;
+  tipEl.style.top = `${Math.round(y)}px`;
+}
+
+function show(entry) {
+  if (current?.el === entry.el) return;
+  hide();
+  current = entry;
+  entry.el.classList.add("help-current");
+  fillTip(entry);
+  tipEl.hidden = false;
+  const rect = visibleRect(entry.el);
+  placeRing(rect);
+  placeTip(rect);
+}
+
+function hide() {
+  current?.el.classList.remove("help-current");
+  current = null;
+  if (tipEl) tipEl.hidden = true;
+  if (ringEl) ringEl.hidden = true;
+}
+
+/** Mark everything help mode can explain, including lanes added since. */
+function markTargets() {
+  for (const el of document.querySelectorAll(".help-target")) el.classList.remove("help-target");
+  if (!on) return;
+  for (const [sel] of HELP) {
+    for (const el of document.querySelectorAll(sel)) if (isVisible(el)) el.classList.add("help-target");
+  }
+}
+
+function onPointerOver(e) {
+  const entry = findEntry(e.target);
+  if (entry) show(entry);
+  else if (!tipEl.contains(e.target)) hide();
+}
+
+// Help mode takes every press except Guide itself, so pointing around the
+// studio can never act on it. A click shows that control's box, which is also
+// how help mode works on a touch screen.
+function swallow(e) {
+  if (e.target instanceof Element && e.target.closest("#helpModeBtn")) return;
+  e.preventDefault();
+  e.stopPropagation();
+  if (e.type === "click") {
+    const entry = findEntry(e.target);
+    if (entry) show(entry);
+    else hide();
+  }
+}
+
+function onFocus(e) {
+  const entry = findEntry(e.target);
+  if (entry) show(entry);
+}
+
+function onKey(e) {
+  if (e.key === "Escape") {
+    e.preventDefault();
+    e.stopPropagation();
+    setHelpMode(false);
+  }
+}
+
+const PRESS_EVENTS = ["pointerdown", "mousedown", "click", "dblclick", "dragstart", "contextmenu"];
+
+export function setHelpMode(next) {
+  if (next === on) return;
+  on = next;
+  document.body.classList.toggle("help-mode", on);
+  if (pillEl) {
+    pillEl.textContent = t("help.pill");
+    pillEl.hidden = !on;
+  }
+  const btn = document.getElementById("helpModeBtn");
+  btn?.setAttribute("aria-pressed", String(on));
+  if (on) {
+    document.addEventListener("pointerover", onPointerOver, true);
+    for (const type of PRESS_EVENTS) document.addEventListener(type, swallow, true);
+    document.addEventListener("keydown", onKey, true);
+    document.addEventListener("focusin", onFocus, true);
+    window.addEventListener("resize", hide);
+    document.addEventListener("scroll", hide, true);
+    markTargets();
+  } else {
+    document.removeEventListener("pointerover", onPointerOver, true);
+    for (const type of PRESS_EVENTS) document.removeEventListener(type, swallow, true);
+    document.removeEventListener("keydown", onKey, true);
+    document.removeEventListener("focusin", onFocus, true);
+    window.removeEventListener("resize", hide);
+    document.removeEventListener("scroll", hide, true);
+    hide();
+    markTargets();
+  }
+}
+
+export function initHelpMode() {
+  const btn = document.getElementById("helpModeBtn");
+  if (!btn || btn.dataset.ready === "1") return;
+  btn.dataset.ready = "1";
+  tipEl = document.createElement("div");
+  tipEl.className = "help-tip";
+  tipEl.id = "helpTip";
+  tipEl.setAttribute("role", "tooltip");
+  tipEl.hidden = true;
+  pillEl = document.createElement("div");
+  pillEl.className = "help-pill";
+  pillEl.setAttribute("role", "status");
+  pillEl.hidden = true;
+  ringEl = document.createElement("div");
+  ringEl.className = "help-ring";
+  ringEl.setAttribute("aria-hidden", "true");
+  ringEl.hidden = true;
+  document.body.append(ringEl, tipEl, pillEl);
+  btn.addEventListener("click", () => setHelpMode(!on));
+}
diff --git a/static/js/i18n.js b/static/js/i18n.js
index f10e4d40..d6e9f29b 100644
--- a/static/js/i18n.js
+++ b/static/js/i18n.js
@@ -442,6 +442,84 @@ const en = {
   "nav.weRecommendLine1": "We",
   "nav.weRecommendLine2": "Recommend",
   "nav.help": "Help",
+  "help.button": "Explain the screen",
+  "help.railLabel": "Guide",
+  "help.pill": "Help mode: point at anything to see what it does. Esc to leave.",
+  "help.helpMode": "Help mode is on. Point at anything, or click it, to see what it does. Press Esc or this button to leave.",
+  "help.website": "Opens stemdeck.app in your browser.",
+  "help.upload": "Pick an audio file from your computer to split into its instruments.",
+  "help.search": "Type a song name to search for it online, or paste a link. You can also drop an audio file here.",
+  "help.stemAll": "Extract every instrument the song has.",
+  "help.stemChip": "Click to include or leave out {name} when you extract.",
+  "help.vocalCombined": "Keeps all the singing in one Vocals lane.",
+  "help.vocalSplit": "Splits the singing into the lead voice and the backing voices.",
+  "help.detectStructure": "Experimental. When on, the next song you import gets its intro, verse and chorus marked for you.",
+  "help.analysisToggle": "Shows or hides the row of song facts: key, tempo, loudness and more.",
+  "help.sectionsToggle": "Shows or hides the sections bar, where the parts of the song are marked.",
+  "help.extract": "Starts splitting the song into its instruments. Each one gets its own lane below.",
+  "help.favorite": "Adds the open song to Favorites, or takes it out.",
+  "help.songDetails": "Details about the open song.",
+  "help.toggleLibrary": "Hides the song list to give the studio more room, or brings it back.",
+  "help.favorites": "Shows only the songs you gave a heart.",
+  "help.library": "Shows all your songs in the list.",
+  "help.lyrics": "Shows the words of the song, lit up line by line as it plays.",
+  "help.trash": "Deleted songs wait here until you empty the Trash. The number shows how many there are.",
+  "help.queue": "The songs waiting to be split, in the order they will be done.",
+  "help.notifications": "Messages from StemDeck, such as a new release or an import that failed.",
+  "help.recommend": "Artists, instrument makers and gear worth knowing. StemDeck takes no money from any of them.",
+  "help.about": "Links to the website, GitHub and Discord, and the credits.",
+  "help.searchLibrary": "Type part of a song's name to find it. Start with # to find songs by tag.",
+  "help.newFolder": "Makes a folder, so you can sort your songs.",
+  "help.trashedSong": "A deleted song. Hold it for a second to bring it back.",
+  "help.song": "Click a song to open it in the studio.",
+  "help.addSection": "Adds a section, like a verse or a chorus, to the sections bar.",
+  "help.volume": "Drag to make {name} louder or quieter.",
+  "help.laneKeyUp": "Moves only {name} up one semitone, the smallest step in music.",
+  "help.laneKeyDown": "Moves only {name} down one semitone, the smallest step in music.",
+  "help.laneKeyTitle": "Key of {name}",
+  "help.laneKey": "The key of {name}. K means its original key; a number means how many semitones it moved.",
+  "help.mute": "Silences {name}, so you can play or sing that part yourself.",
+  "help.solo": "Plays only {name}, to hear it clearly.",
+  "help.download": "Saves {name} as its own audio file.",
+  "help.songFactsTitle": "Song facts",
+  "help.songFacts": "Found for you: the key, the tempo in BPM, loudness, length and how much of each instrument the song has.",
+  "help.wavesTitle": "Waveforms",
+  "help.waves": "Each instrument's sound, drawn over time. Click to jump to that moment. Drag across to loop that part.",
+  "help.stop": "Stops the song.",
+  "help.play": "Plays the song, or pauses it.",
+  "help.loop": "Turns looping on or off: the part between the two times beside it repeats. The L key does the same.",
+  "help.loopStart": "Where the loop begins, in seconds. Scroll over it to move it.",
+  "help.loopEnd": "Where the loop ends, in seconds. Scroll over it to move it.",
+  "help.speedHalf": "Plays at half speed. The pitch stays the same.",
+  "help.speedSlow": "Plays at three-quarter speed. Scroll over it to pick any speed from 0.50x to 0.99x.",
+  "help.speedNormal": "Plays at the song's own speed.",
+  "help.keyDown": "Moves the whole song down one semitone, the smallest step in music.",
+  "help.keyUp": "Moves the whole song up one semitone, the smallest step in music.",
+  "help.keyReset": "Puts every part back in the song's original key.",
+  "help.click": "Turns on a click that follows the song's tempo. The K key does the same.",
+  "help.clickVolume": "How loud the click is.",
+  "help.clickMore": "More settings for the click track.",
+  "help.export": "Saves what you hear as one audio file. Its menu also offers every part as a .zip, or only the looped part.",
+  "help.set.language": "The language of the app.",
+  "help.set.maxDuration": "The longest song it accepts, in minutes.",
+  "help.set.playlistLimit": "The most songs one playlist adds.",
+  "help.set.cookies": "Only needed if YouTube asks you to prove you are not a bot.",
+  "help.set.stemsLocation": "Where your separated songs are stored.",
+  "help.set.exportsLocation": "Where stems and loops you drag out of StemDeck go.",
+  "help.set.autoDelete": "Off unless you turn it on. Deletes songs after the number of days you set.",
+  "help.set.device": "Your graphics card or your processor, for separating.",
+  "help.set.quality": "Best gives cleaner stems and takes twice as long.",
+  "help.set.exportLogs": "Every log in one zip, to attach to a bug report.",
+  "help.set.resetData": "Deletes every song. It cannot be undone.",
+  "help.set.acoustid": "Recognises each song by its sound, with a free AcoustID key.",
+  "help.set.discogs": "Band profiles and releases, with a free Discogs token.",
+  "help.set.transcribe": "Writes down the words from the vocals when no lyrics are found.",
+  "help.set.network": "Open StemDeck on your phone or tablet, on the same Wi-Fi. Scan the QR code, or type the address shown.",
+  "help.set.port": "The port StemDeck runs on. Restart to apply.",
+  "help.set.sampleRate": "The sample rate of the audio files you export.",
+  "help.set.videoQuality": "The quality of the videos you export.",
+  "help.set.logs": "Where the logs are, and the application, backend and setup logs.",
+  "help.set.registry": "The list of finished songs StemDeck keeps on disk. Read only.",
 
   "search.ariaLabel": "Search library",
   "search.placeholder": "Search or #tag…",
@@ -1254,6 +1332,84 @@ const pl = {
   "nav.weRecommendLine1": "Pole-",
   "nav.weRecommendLine2": "camy",
   "nav.help": "Pomoc",
+  "help.button": "Wyjaśnij ekran",
+  "help.railLabel": "Przewodnik",
+  "help.pill": "Tryb pomocy: wskaż dowolny element, aby zobaczyć, co robi. Esc, aby wyjść.",
+  "help.helpMode": "Tryb pomocy jest włączony. Wskaż lub kliknij dowolny element, aby zobaczyć, co robi. Esc lub ten przycisk go wyłącza.",
+  "help.website": "Otwiera stemdeck.app w przeglądarce.",
+  "help.upload": "Wybierz plik audio z komputera, aby rozdzielić go na instrumenty.",
+  "help.search": "Wpisz nazwę utworu, aby wyszukać go w sieci, lub wklej link. Możesz też upuścić tu plik audio.",
+  "help.stemAll": "Wyodrębnia każdy instrument w utworze.",
+  "help.stemChip": "Kliknij, aby uwzględnić lub pominąć {name} przy wyodrębnianiu.",
+  "help.vocalCombined": "Zostawia cały śpiew na jednej ścieżce wokalu.",
+  "help.vocalSplit": "Dzieli śpiew na wokal główny i chórki.",
+  "help.detectStructure": "Eksperymentalne. Gdy włączone, następny importowany utwór dostanie oznaczone intro, zwrotki i refreny.",
+  "help.analysisToggle": "Pokazuje lub ukrywa wiersz danych utworu: tonację, tempo, głośność i więcej.",
+  "help.sectionsToggle": "Pokazuje lub ukrywa pasek sekcji, na którym oznaczone są części utworu.",
+  "help.extract": "Zaczyna rozdzielać utwór na instrumenty. Każdy dostaje własną ścieżkę poniżej.",
+  "help.favorite": "Dodaje otwarty utwór do Ulubionych albo go z nich usuwa.",
+  "help.songDetails": "Szczegóły otwartego utworu.",
+  "help.toggleLibrary": "Ukrywa listę utworów, by dać studiu więcej miejsca, albo ją przywraca.",
+  "help.favorites": "Pokazuje tylko utwory, którym dałeś serce.",
+  "help.library": "Pokazuje wszystkie twoje utwory na liście.",
+  "help.lyrics": "Pokazuje tekst utworu, podświetlany linijka po linijce podczas odtwarzania.",
+  "help.trash": "Usunięte utwory czekają tu, aż opróżnisz kosz. Liczba pokazuje, ile ich jest.",
+  "help.queue": "Utwory czekające na rozdzielenie, w kolejności, w jakiej zostaną przetworzone.",
+  "help.notifications": "Wiadomości od StemDeck, na przykład o nowej wersji albo nieudanym imporcie.",
+  "help.recommend": "Artyści, lutnicy i sprzęt warte poznania. StemDeck nie bierze pieniędzy od nikogo z nich.",
+  "help.about": "Linki do strony, GitHuba i Discorda oraz podziękowania.",
+  "help.searchLibrary": "Wpisz część nazwy utworu, aby go znaleźć. Zacznij od #, aby szukać po tagu.",
+  "help.newFolder": "Tworzy folder, w którym możesz porządkować utwory.",
+  "help.trashedSong": "Usunięty utwór. Przytrzymaj go przez sekundę, aby go przywrócić.",
+  "help.song": "Kliknij utwór, aby otworzyć go w studiu.",
+  "help.addSection": "Dodaje sekcję, na przykład zwrotkę lub refren, do paska sekcji.",
+  "help.volume": "Przeciągnij, aby {name} grało głośniej lub ciszej.",
+  "help.laneKeyUp": "Podnosi tylko {name} o półton, najmniejszy krok w muzyce.",
+  "help.laneKeyDown": "Obniża tylko {name} o półton, najmniejszy krok w muzyce.",
+  "help.laneKeyTitle": "Tonacja: {name}",
+  "help.laneKey": "Tonacja: {name}. K oznacza oryginalną tonację; liczba pokazuje, o ile półtonów ją przesunięto.",
+  "help.mute": "Wycisza {name}, żebyś mógł sam zagrać lub zaśpiewać tę partię.",
+  "help.solo": "Odtwarza tylko {name}, żeby było wyraźnie słychać.",
+  "help.download": "Zapisuje {name} jako osobny plik audio.",
+  "help.songFactsTitle": "Dane utworu",
+  "help.songFacts": "Wyznaczone dla ciebie: tonacja, tempo w BPM, głośność, długość i udział każdego instrumentu.",
+  "help.wavesTitle": "Przebiegi",
+  "help.waves": "Dźwięk każdego instrumentu w czasie. Kliknij, aby przejść do tego momentu. Przeciągnij, aby zapętlić ten fragment.",
+  "help.stop": "Zatrzymuje utwór.",
+  "help.play": "Odtwarza utwór albo go wstrzymuje.",
+  "help.loop": "Włącza lub wyłącza pętlę: fragment między dwoma czasami obok się powtarza. Klawisz L robi to samo.",
+  "help.loopStart": "Gdzie zaczyna się pętla, w sekundach. Przewiń nad nim kółkiem, aby ją przesunąć.",
+  "help.loopEnd": "Gdzie kończy się pętla, w sekundach. Przewiń nad nim kółkiem, aby ją przesunąć.",
+  "help.speedHalf": "Odtwarza w połowie prędkości. Wysokość dźwięku się nie zmienia.",
+  "help.speedSlow": "Odtwarza w trzech czwartych prędkości. Przewiń nad nim kółkiem, aby wybrać prędkość od 0.50x do 0.99x.",
+  "help.speedNormal": "Odtwarza w oryginalnej prędkości utworu.",
+  "help.keyDown": "Obniża cały utwór o półton, najmniejszy krok w muzyce.",
+  "help.keyUp": "Podnosi cały utwór o półton, najmniejszy krok w muzyce.",
+  "help.keyReset": "Przywraca każdą partię do oryginalnej tonacji utworu.",
+  "help.click": "Włącza klik, który podąża za tempem utworu. Klawisz K robi to samo.",
+  "help.clickVolume": "Jak głośny jest klik.",
+  "help.clickMore": "Więcej ustawień kliku.",
+  "help.export": "Zapisuje to, co słyszysz, jako jeden plik audio. Jego menu oferuje też każdą partię w .zip albo tylko zapętlony fragment.",
+  "help.set.language": "Język aplikacji.",
+  "help.set.maxDuration": "Najdłuższy przyjmowany utwór, w minutach.",
+  "help.set.playlistLimit": "Najwięcej utworów, jakie doda jedna playlista.",
+  "help.set.cookies": "Potrzebne tylko, gdy YouTube poprosi o potwierdzenie, że nie jesteś botem.",
+  "help.set.stemsLocation": "Gdzie zapisywane są rozdzielone utwory.",
+  "help.set.exportsLocation": "Dokąd trafiają ścieżki i pętle przeciągnięte poza StemDeck.",
+  "help.set.autoDelete": "Wyłączone, dopóki tego nie włączysz. Usuwa utwory po wybranej liczbie dni.",
+  "help.set.device": "Twoja karta graficzna lub procesor, do rozdzielania.",
+  "help.set.quality": "Best daje czystsze ścieżki i trwa dwa razy dłużej.",
+  "help.set.exportLogs": "Wszystkie logi w jednym zipie, do zgłoszenia błędu.",
+  "help.set.resetData": "Usuwa wszystkie utwory. Nie można tego cofnąć.",
+  "help.set.acoustid": "Rozpoznaje każdy utwór po brzmieniu, z darmowym kluczem AcoustID.",
+  "help.set.discogs": "Profile zespołów i wydania, z darmowym tokenem Discogs.",
+  "help.set.transcribe": "Spisuje tekst z wokalu, gdy nie znaleziono tekstu utworu.",
+  "help.set.network": "Otwórz StemDeck na telefonie lub tablecie w tej samej sieci Wi-Fi. Zeskanuj kod QR lub wpisz pokazany adres.",
+  "help.set.port": "Port, na którym działa StemDeck. Uruchom ponownie, aby zastosować.",
+  "help.set.sampleRate": "Częstotliwość próbkowania eksportowanych plików audio.",
+  "help.set.videoQuality": "Jakość eksportowanych filmów.",
+  "help.set.logs": "Gdzie są logi oraz logi aplikacji, serwera i instalacji.",
+  "help.set.registry": "Lista ukończonych utworów, którą StemDeck trzyma na dysku. Tylko do odczytu.",
 
   "search.ariaLabel": "Szukaj w bibliotece",
   "search.placeholder": "Szukaj lub #tag…",
@@ -2056,6 +2212,84 @@ const ja = {
   "nav.weRecommendLine1": "おす",
   "nav.weRecommendLine2": "すめ",
   "nav.help": "ヘルプ",
+  "help.button": "画面を説明",
+  "help.railLabel": "ガイド",
+  "help.pill": "ヘルプモード：項目を指すと、その働きが表示されます。Esc で終了。",
+  "help.helpMode": "ヘルプモードがオンです。項目を指すかクリックすると、その働きが表示されます。Esc かこのボタンで終了します。",
+  "help.website": "ブラウザで stemdeck.app を開きます。",
+  "help.upload": "パソコンから音声ファイルを選び、楽器ごとに分けます。",
+  "help.search": "曲名を入力してオンラインで検索するか、リンクを貼り付けます。音声ファイルをここにドロップすることもできます。",
+  "help.stemAll": "曲に含まれるすべての楽器を抽出します。",
+  "help.stemChip": "クリックすると、抽出に{name}を含めるか外すかを切り替えます。",
+  "help.vocalCombined": "歌声をすべて 1 つのボーカルレーンにまとめます。",
+  "help.vocalSplit": "歌声をリードボーカルとバックボーカルに分けます。",
+  "help.detectStructure": "実験的機能。オンにすると、次に取り込む曲のイントロ、Aメロ、サビに印が付きます。",
+  "help.analysisToggle": "キー、テンポ、ラウドネスなど、曲の情報の行を表示または非表示にします。",
+  "help.sectionsToggle": "曲のパートが示されるセクションバーを表示または非表示にします。",
+  "help.extract": "曲を楽器ごとに分け始めます。それぞれ下に専用のレーンができます。",
+  "help.favorite": "開いている曲をお気に入りに追加するか、外します。",
+  "help.songDetails": "開いている曲の詳細です。",
+  "help.toggleLibrary": "曲リストを隠してスタジオを広くするか、元に戻します。",
+  "help.favorites": "ハートを付けた曲だけを表示します。",
+  "help.library": "すべての曲をリストに表示します。",
+  "help.lyrics": "曲の歌詞を表示し、再生に合わせて 1 行ずつ光ります。",
+  "help.trash": "削除した曲は、ゴミ箱を空にするまでここに残ります。数字は曲の数です。",
+  "help.queue": "分離を待っている曲を、処理される順に並べています。",
+  "help.notifications": "新しいリリースや失敗した取り込みなど、StemDeck からのお知らせです。",
+  "help.recommend": "知っておきたいアーティスト、楽器職人、機材です。StemDeck はどこからもお金を受け取っていません。",
+  "help.about": "ウェブサイト、GitHub、Discord へのリンクとクレジットです。",
+  "help.searchLibrary": "曲名の一部を入力して探します。# から始めるとタグで探せます。",
+  "help.newFolder": "曲を整理するためのフォルダーを作ります。",
+  "help.trashedSong": "削除した曲です。1 秒長押しすると元に戻ります。",
+  "help.song": "曲をクリックするとスタジオで開きます。",
+  "help.addSection": "Aメロやサビなどのセクションをセクションバーに追加します。",
+  "help.volume": "ドラッグして{name}の音量を上げ下げします。",
+  "help.laneKeyUp": "{name}だけを半音上げます。半音は音楽で最も小さな音程の単位です。",
+  "help.laneKeyDown": "{name}だけを半音下げます。半音は音楽で最も小さな音程の単位です。",
+  "help.laneKeyTitle": "{name}のキー",
+  "help.laneKey": "{name}のキーです。K は元のキー、数字は何半音動かしたかを示します。",
+  "help.mute": "{name}をミュートします。そのパートを自分で演奏したり歌ったりできます。",
+  "help.solo": "{name}だけを再生して、はっきり聞けるようにします。",
+  "help.download": "{name}を単独の音声ファイルとして保存します。",
+  "help.songFactsTitle": "曲の情報",
+  "help.songFacts": "キー、BPM で表したテンポ、ラウドネス、長さ、各楽器の割合を自動で調べています。",
+  "help.wavesTitle": "波形",
+  "help.waves": "各楽器の音を時間に沿って描いたものです。クリックでその位置へ移動し、ドラッグでその部分をループします。",
+  "help.stop": "曲を止めます。",
+  "help.play": "曲を再生、または一時停止します。",
+  "help.loop": "ループのオンとオフを切り替えます。横の 2 つの時間の間が繰り返されます。L キーでも同じです。",
+  "help.loopStart": "ループの開始位置(秒)です。上でスクロールすると動かせます。",
+  "help.loopEnd": "ループの終了位置(秒)です。上でスクロールすると動かせます。",
+  "help.speedHalf": "半分の速さで再生します。音の高さは変わりません。",
+  "help.speedSlow": "4 分の 3 の速さで再生します。上でスクロールすると 0.50x から 0.99x の間で選べます。",
+  "help.speedNormal": "曲本来の速さで再生します。",
+  "help.keyDown": "曲全体を半音下げます。半音は音楽で最も小さな音程の単位です。",
+  "help.keyUp": "曲全体を半音上げます。半音は音楽で最も小さな音程の単位です。",
+  "help.keyReset": "すべてのパートを曲の元のキーに戻します。",
+  "help.click": "曲のテンポに合わせたクリックをオンにします。K キーでも同じです。",
+  "help.clickVolume": "クリックの音量です。",
+  "help.clickMore": "クリックのその他の設定です。",
+  "help.export": "聞こえている音を 1 つの音声ファイルとして保存します。メニューから、全パートの .zip やループ部分だけも選べます。",
+  "help.set.language": "アプリの表示言語です。",
+  "help.set.maxDuration": "受け付ける曲の最大の長さ(分)です。",
+  "help.set.playlistLimit": "1 つのプレイリストで追加される曲の最大数です。",
+  "help.set.cookies": "YouTube にボットでないことの確認を求められたときだけ必要です。",
+  "help.set.stemsLocation": "分離した曲の保存場所です。",
+  "help.set.exportsLocation": "StemDeck からドラッグしたステムやループの保存先です。",
+  "help.set.autoDelete": "オンにしない限りオフです。指定した日数が過ぎた曲を削除します。",
+  "help.set.device": "分離に使うグラフィックカードまたはプロセッサーです。",
+  "help.set.quality": "Best はステムがよりきれいになり、時間が 2 倍かかります。",
+  "help.set.exportLogs": "すべてのログを 1 つの zip にまとめます。不具合の報告に添付できます。",
+  "help.set.resetData": "すべての曲を削除します。元に戻せません。",
+  "help.set.acoustid": "無料の AcoustID キーで、音から各曲を識別します。",
+  "help.set.discogs": "無料の Discogs トークンで、バンドのプロフィールとリリースを取得します。",
+  "help.set.transcribe": "歌詞が見つからないとき、ボーカルから歌詞を書き起こします。",
+  "help.set.network": "同じ Wi-Fi のスマートフォンやタブレットで StemDeck を開けます。QR コードを読み取るか、表示されたアドレスを入力します。",
+  "help.set.port": "StemDeck が動くポートです。再起動すると反映されます。",
+  "help.set.sampleRate": "書き出す音声ファイルのサンプルレートです。",
+  "help.set.videoQuality": "書き出す動画の画質です。",
+  "help.set.logs": "ログの保存場所と、アプリ、バックエンド、セットアップのログです。",
+  "help.set.registry": "StemDeck がディスクに保存している完了した曲の一覧です。読み取り専用です。",
 
   "search.ariaLabel": "ライブラリを検索",
   "search.placeholder": "検索または#タグ…",
@@ -2833,6 +3067,84 @@ const zhHans = {
   "nav.weRecommendLine1": "推",
   "nav.weRecommendLine2": "荐",
   "nav.help": "帮助",
+  "help.button": "讲解界面",
+  "help.railLabel": "指南",
+  "help.pill": "帮助模式：指向任何项目即可看到它的作用。按 Esc 退出。",
+  "help.helpMode": "帮助模式已开启。指向或点击任何项目即可看到它的作用。按 Esc 或此按钮退出。",
+  "help.website": "在浏览器中打开 stemdeck.app。",
+  "help.upload": "从电脑中选择一个音频文件，把它分离成各个乐器。",
+  "help.search": "输入歌名在线搜索，或粘贴链接。也可以把音频文件拖到这里。",
+  "help.stemAll": "提取歌曲中的所有乐器。",
+  "help.stemChip": "点击以在提取时包含或排除{name}。",
+  "help.vocalCombined": "把所有歌声保留在一条人声音轨中。",
+  "help.vocalSplit": "把歌声分成主唱和和声。",
+  "help.detectStructure": "实验功能。开启后，下一首导入的歌曲会自动标出前奏、主歌和副歌。",
+  "help.analysisToggle": "显示或隐藏歌曲信息行：调性、速度、响度等。",
+  "help.sectionsToggle": "显示或隐藏段落栏，歌曲的各个部分在那里标出。",
+  "help.extract": "开始把歌曲分离成各个乐器。每个乐器在下方有自己的音轨。",
+  "help.favorite": "把当前歌曲加入收藏，或移出收藏。",
+  "help.songDetails": "当前歌曲的详细信息。",
+  "help.toggleLibrary": "隐藏歌曲列表让工作室更宽敞，或重新显示。",
+  "help.favorites": "只显示你点了心的歌曲。",
+  "help.library": "在列表中显示你的所有歌曲。",
+  "help.lyrics": "显示歌词，播放时逐行点亮。",
+  "help.trash": "删除的歌曲会留在这里，直到你清空回收站。数字表示有多少首。",
+  "help.queue": "等待分离的歌曲，按处理顺序排列。",
+  "help.notifications": "来自 StemDeck 的消息，例如新版本或导入失败。",
+  "help.recommend": "值得认识的艺术家、乐器制作者和设备。StemDeck 不接受其中任何一方的钱。",
+  "help.about": "网站、GitHub 和 Discord 的链接，以及致谢。",
+  "help.searchLibrary": "输入歌名的一部分来查找。以 # 开头可按标签查找。",
+  "help.newFolder": "新建文件夹，用来整理歌曲。",
+  "help.trashedSong": "已删除的歌曲。按住一秒即可恢复。",
+  "help.song": "点击歌曲，在工作室中打开它。",
+  "help.addSection": "在段落栏中添加一个段落，例如主歌或副歌。",
+  "help.volume": "拖动以调大或调小{name}的音量。",
+  "help.laneKeyUp": "只把{name}升高一个半音，半音是音乐中最小的音程。",
+  "help.laneKeyDown": "只把{name}降低一个半音，半音是音乐中最小的音程。",
+  "help.laneKeyTitle": "{name}的调",
+  "help.laneKey": "{name}的调。K 表示原调；数字表示移动了几个半音。",
+  "help.mute": "将{name}静音，让你自己演奏或演唱这一部分。",
+  "help.solo": "只播放{name}，听得更清楚。",
+  "help.download": "把{name}保存为单独的音频文件。",
+  "help.songFactsTitle": "歌曲信息",
+  "help.songFacts": "已为你分析：调性、以 BPM 表示的速度、响度、时长，以及每种乐器的占比。",
+  "help.wavesTitle": "波形",
+  "help.waves": "每种乐器的声音随时间的变化。点击跳到那一刻，拖动可循环那一段。",
+  "help.stop": "停止播放。",
+  "help.play": "播放歌曲，或暂停。",
+  "help.loop": "开启或关闭循环：旁边两个时间之间的部分会重复。按 L 键效果相同。",
+  "help.loopStart": "循环的开始位置，单位为秒。在上面滚动即可移动。",
+  "help.loopEnd": "循环的结束位置，单位为秒。在上面滚动即可移动。",
+  "help.speedHalf": "以一半速度播放，音高不变。",
+  "help.speedSlow": "以四分之三速度播放。在上面滚动可选择 0.50x 到 0.99x 之间的任意速度。",
+  "help.speedNormal": "以歌曲原速播放。",
+  "help.keyDown": "把整首歌降低一个半音，半音是音乐中最小的音程。",
+  "help.keyUp": "把整首歌升高一个半音，半音是音乐中最小的音程。",
+  "help.keyReset": "把每一部分恢复到歌曲的原调。",
+  "help.click": "开启跟随歌曲速度的节拍声。按 K 键效果相同。",
+  "help.clickVolume": "节拍声的音量。",
+  "help.clickMore": "节拍声的更多设置。",
+  "help.export": "把你听到的内容保存为一个音频文件。菜单中还可以把每个部分打包为 .zip，或只导出循环部分。",
+  "help.set.language": "应用的显示语言。",
+  "help.set.maxDuration": "可接受的最长歌曲，单位为分钟。",
+  "help.set.playlistLimit": "一个播放列表最多添加的歌曲数。",
+  "help.set.cookies": "只有在 YouTube 要求你证明自己不是机器人时才需要。",
+  "help.set.stemsLocation": "分离后歌曲的存放位置。",
+  "help.set.exportsLocation": "从 StemDeck 拖出的音轨和循环的存放位置。",
+  "help.set.autoDelete": "默认关闭。开启后会在你设定的天数后删除歌曲。",
+  "help.set.device": "用于分离的显卡或处理器。",
+  "help.set.quality": "Best 的分离更干净，耗时是两倍。",
+  "help.set.exportLogs": "把所有日志打包成一个 zip，可附在错误报告中。",
+  "help.set.resetData": "删除所有歌曲，无法撤销。",
+  "help.set.acoustid": "使用免费的 AcoustID 密钥，按声音识别每首歌曲。",
+  "help.set.discogs": "使用免费的 Discogs 令牌，获取乐队资料和发行信息。",
+  "help.set.transcribe": "找不到歌词时，从人声中转写歌词。",
+  "help.set.network": "在同一 Wi-Fi 下用手机或平板打开 StemDeck。扫描二维码，或输入显示的地址。",
+  "help.set.port": "StemDeck 运行的端口。重启后生效。",
+  "help.set.sampleRate": "导出音频文件的采样率。",
+  "help.set.videoQuality": "导出视频的画质。",
+  "help.set.logs": "日志的位置，以及应用、后端和安装日志。",
+  "help.set.registry": "StemDeck 保存在磁盘上的已完成歌曲列表。只读。",
 
   "search.ariaLabel": "搜索资料库",
   "search.placeholder": "搜索或 #标签…",
@@ -3610,6 +3922,84 @@ const de = {
   "nav.weRecommendLine1": "Wir",
   "nav.weRecommendLine2": "empfehlen",
   "nav.help": "Hilfe",
+  "help.button": "Bildschirm erklären",
+  "help.railLabel": "Anleitung",
+  "help.pill": "Hilfemodus: Zeig auf etwas, um zu sehen, was es tut. Esc zum Beenden.",
+  "help.helpMode": "Der Hilfemodus ist an. Zeig auf etwas oder klick es an, um zu sehen, was es tut. Esc oder dieser Button beendet ihn.",
+  "help.website": "Öffnet stemdeck.app in deinem Browser.",
+  "help.upload": "Wähle eine Audiodatei auf deinem Computer, um sie in ihre Instrumente zu zerlegen.",
+  "help.search": "Gib einen Songnamen ein, um online danach zu suchen, oder füge einen Link ein. Du kannst auch eine Audiodatei hierher ziehen.",
+  "help.stemAll": "Extrahiert jedes Instrument, das der Song hat.",
+  "help.stemChip": "Klick, um {name} beim Extrahieren mitzunehmen oder wegzulassen.",
+  "help.vocalCombined": "Behält den ganzen Gesang in einer Vocals-Spur.",
+  "help.vocalSplit": "Teilt den Gesang in Leadstimme und Begleitstimmen.",
+  "help.detectStructure": "Experimentell. Wenn an, bekommt der nächste importierte Song Intro, Strophe und Refrain markiert.",
+  "help.analysisToggle": "Zeigt oder versteckt die Zeile mit den Songdaten: Tonart, Tempo, Lautheit und mehr.",
+  "help.sectionsToggle": "Zeigt oder versteckt die Abschnittsleiste, in der die Teile des Songs markiert sind.",
+  "help.extract": "Startet das Zerlegen des Songs in seine Instrumente. Jedes bekommt unten eine eigene Spur.",
+  "help.favorite": "Fügt den offenen Song zu den Favoriten hinzu oder nimmt ihn wieder heraus.",
+  "help.songDetails": "Details zum offenen Song.",
+  "help.toggleLibrary": "Blendet die Songliste aus, damit das Studio mehr Platz hat, oder holt sie zurück.",
+  "help.favorites": "Zeigt nur die Songs, denen du ein Herz gegeben hast.",
+  "help.library": "Zeigt alle deine Songs in der Liste.",
+  "help.lyrics": "Zeigt den Songtext, Zeile für Zeile hervorgehoben, während der Song läuft.",
+  "help.trash": "Gelöschte Songs warten hier, bis du den Papierkorb leerst. Die Zahl zeigt, wie viele es sind.",
+  "help.queue": "Die Songs, die auf das Zerlegen warten, in der Reihenfolge, in der sie drankommen.",
+  "help.notifications": "Nachrichten von StemDeck, etwa eine neue Version oder ein fehlgeschlagener Import.",
+  "help.recommend": "Künstler, Instrumentenbauer und Equipment, die man kennen sollte. StemDeck nimmt von keinem davon Geld.",
+  "help.about": "Links zur Website, zu GitHub und Discord, und die Credits.",
+  "help.searchLibrary": "Gib einen Teil des Songnamens ein, um ihn zu finden. Beginne mit #, um nach Tag zu suchen.",
+  "help.newFolder": "Legt einen Ordner an, damit du deine Songs sortieren kannst.",
+  "help.trashedSong": "Ein gelöschter Song. Halte ihn eine Sekunde lang gedrückt, um ihn zurückzuholen.",
+  "help.song": "Klick auf einen Song, um ihn im Studio zu öffnen.",
+  "help.addSection": "Fügt der Abschnittsleiste einen Abschnitt hinzu, etwa eine Strophe oder einen Refrain.",
+  "help.volume": "Zieh, um {name} lauter oder leiser zu machen.",
+  "help.laneKeyUp": "Hebt nur {name} um einen Halbton an, den kleinsten Schritt in der Musik.",
+  "help.laneKeyDown": "Senkt nur {name} um einen Halbton, den kleinsten Schritt in der Musik.",
+  "help.laneKeyTitle": "Tonart von {name}",
+  "help.laneKey": "Die Tonart von {name}. K heißt Originaltonart; eine Zahl zeigt, um wie viele Halbtöne verschoben wurde.",
+  "help.mute": "Schaltet {name} stumm, damit du diesen Part selbst spielen oder singen kannst.",
+  "help.solo": "Spielt nur {name}, damit du es deutlich hörst.",
+  "help.download": "Speichert {name} als eigene Audiodatei.",
+  "help.songFactsTitle": "Songdaten",
+  "help.songFacts": "Für dich ermittelt: Tonart, Tempo in BPM, Lautheit, Länge und wie viel von jedem Instrument der Song hat.",
+  "help.wavesTitle": "Wellenformen",
+  "help.waves": "Der Klang jedes Instruments über die Zeit. Klick, um an diese Stelle zu springen. Zieh darüber, um diesen Teil zu loopen.",
+  "help.stop": "Stoppt den Song.",
+  "help.play": "Spielt den Song ab oder pausiert ihn.",
+  "help.loop": "Schaltet den Loop an oder aus: Der Teil zwischen den beiden Zeiten daneben wiederholt sich. Die Taste L tut dasselbe.",
+  "help.loopStart": "Wo der Loop beginnt, in Sekunden. Scroll darüber, um ihn zu verschieben.",
+  "help.loopEnd": "Wo der Loop endet, in Sekunden. Scroll darüber, um ihn zu verschieben.",
+  "help.speedHalf": "Spielt mit halber Geschwindigkeit. Die Tonhöhe bleibt gleich.",
+  "help.speedSlow": "Spielt mit drei Viertel der Geschwindigkeit. Scroll darüber, um jede Geschwindigkeit von 0.50x bis 0.99x zu wählen.",
+  "help.speedNormal": "Spielt in der Originalgeschwindigkeit des Songs.",
+  "help.keyDown": "Senkt den ganzen Song um einen Halbton, den kleinsten Schritt in der Musik.",
+  "help.keyUp": "Hebt den ganzen Song um einen Halbton an, den kleinsten Schritt in der Musik.",
+  "help.keyReset": "Setzt jeden Part zurück in die Originaltonart des Songs.",
+  "help.click": "Schaltet einen Klick an, der dem Tempo des Songs folgt. Die Taste K tut dasselbe.",
+  "help.clickVolume": "Wie laut der Klick ist.",
+  "help.clickMore": "Weitere Einstellungen für den Klick.",
+  "help.export": "Speichert, was du hörst, als eine Audiodatei. Sein Menü bietet auch jeden Part als .zip oder nur den geloopten Teil.",
+  "help.set.language": "Die Sprache der App.",
+  "help.set.maxDuration": "Der längste Song, der angenommen wird, in Minuten.",
+  "help.set.playlistLimit": "Die meisten Songs, die eine Playlist hinzufügt.",
+  "help.set.cookies": "Nur nötig, wenn YouTube verlangt, dass du beweist, kein Bot zu sein.",
+  "help.set.stemsLocation": "Wo deine zerlegten Songs gespeichert werden.",
+  "help.set.exportsLocation": "Wohin Stems und Loops gehen, die du aus StemDeck herausziehst.",
+  "help.set.autoDelete": "Aus, solange du es nicht einschaltest. Löscht Songs nach der Anzahl Tage, die du festlegst.",
+  "help.set.device": "Deine Grafikkarte oder dein Prozessor, für das Zerlegen.",
+  "help.set.quality": "Best liefert sauberere Stems und dauert doppelt so lange.",
+  "help.set.exportLogs": "Alle Logs in einer Zip-Datei, für einen Fehlerbericht.",
+  "help.set.resetData": "Löscht jeden Song. Lässt sich nicht rückgängig machen.",
+  "help.set.acoustid": "Erkennt jeden Song an seinem Klang, mit einem kostenlosen AcoustID-Schlüssel.",
+  "help.set.discogs": "Bandprofile und Veröffentlichungen, mit einem kostenlosen Discogs-Token.",
+  "help.set.transcribe": "Schreibt den Text aus dem Gesang mit, wenn kein Songtext gefunden wird.",
+  "help.set.network": "Öffne StemDeck auf deinem Handy oder Tablet im selben WLAN. Scanne den QR-Code oder tippe die angezeigte Adresse ein.",
+  "help.set.port": "Der Port, auf dem StemDeck läuft. Neustart zum Übernehmen.",
+  "help.set.sampleRate": "Die Abtastrate der Audiodateien, die du exportierst.",
+  "help.set.videoQuality": "Die Qualität der Videos, die du exportierst.",
+  "help.set.logs": "Wo die Logs liegen, und das Anwendungs-, Backend- und Setup-Log.",
+  "help.set.registry": "Die Liste der fertigen Songs, die StemDeck auf der Festplatte führt. Nur lesbar.",
 
   "search.ariaLabel": "Bibliothek durchsuchen",
   "search.placeholder": "Suchen oder #Tag…",
@@ -4398,6 +4788,84 @@ const pt = {
   "nav.weRecommendLine1": "Recomen-",
   "nav.weRecommendLine2": "damos",
   "nav.help": "Ajuda",
+  "help.button": "Explicar a tela",
+  "help.railLabel": "Guia",
+  "help.pill": "Modo ajuda: aponte para qualquer coisa para ver o que faz. Esc para sair.",
+  "help.helpMode": "O modo ajuda está ligado. Aponte ou clique em algo para ver o que faz. Pressione Esc ou este botão para sair.",
+  "help.website": "Abre stemdeck.app no seu navegador.",
+  "help.upload": "Escolha um arquivo de áudio do seu computador para separar em instrumentos.",
+  "help.search": "Digite o nome de uma música para buscar online, ou cole um link. Você também pode soltar um arquivo de áudio aqui.",
+  "help.stemAll": "Extrai todos os instrumentos da música.",
+  "help.stemChip": "Clique para incluir ou deixar de fora {name} na extração.",
+  "help.vocalCombined": "Mantém todo o canto em uma única faixa de Vocais.",
+  "help.vocalSplit": "Separa o canto na voz principal e nos backing vocals.",
+  "help.detectStructure": "Experimental. Ligado, a próxima música importada recebe a intro, os versos e os refrões marcados.",
+  "help.analysisToggle": "Mostra ou esconde a linha de dados da música: tom, andamento, volume e mais.",
+  "help.sectionsToggle": "Mostra ou esconde a barra de seções, onde as partes da música são marcadas.",
+  "help.extract": "Começa a separar a música em instrumentos. Cada um ganha sua própria faixa abaixo.",
+  "help.favorite": "Adiciona a música aberta aos Favoritos, ou a retira.",
+  "help.songDetails": "Detalhes da música aberta.",
+  "help.toggleLibrary": "Esconde a lista de músicas para dar mais espaço ao estúdio, ou a traz de volta.",
+  "help.favorites": "Mostra só as músicas que você marcou com coração.",
+  "help.library": "Mostra todas as suas músicas na lista.",
+  "help.lyrics": "Mostra a letra, iluminada linha por linha enquanto toca.",
+  "help.trash": "As músicas apagadas esperam aqui até você esvaziar a lixeira. O número mostra quantas há.",
+  "help.queue": "As músicas esperando para serem separadas, na ordem em que serão feitas.",
+  "help.notifications": "Mensagens do StemDeck, como uma nova versão ou uma importação que falhou.",
+  "help.recommend": "Artistas, luthiers e equipamentos que vale a pena conhecer. O StemDeck não recebe dinheiro de nenhum deles.",
+  "help.about": "Links para o site, GitHub e Discord, e os créditos.",
+  "help.searchLibrary": "Digite parte do nome de uma música para encontrá-la. Comece com # para buscar por tag.",
+  "help.newFolder": "Cria uma pasta para organizar suas músicas.",
+  "help.trashedSong": "Uma música apagada. Segure-a por um segundo para trazê-la de volta.",
+  "help.song": "Clique em uma música para abri-la no estúdio.",
+  "help.addSection": "Adiciona uma seção, como um verso ou um refrão, à barra de seções.",
+  "help.volume": "Arraste para deixar {name} mais alto ou mais baixo.",
+  "help.laneKeyUp": "Sobe só {name} um semitom, o menor passo na música.",
+  "help.laneKeyDown": "Desce só {name} um semitom, o menor passo na música.",
+  "help.laneKeyTitle": "Tom de {name}",
+  "help.laneKey": "O tom de {name}. K quer dizer o tom original; um número mostra quantos semitons ele mudou.",
+  "help.mute": "Silencia {name}, para você tocar ou cantar essa parte.",
+  "help.solo": "Toca só {name}, para ouvir com clareza.",
+  "help.download": "Salva {name} como um arquivo de áudio separado.",
+  "help.songFactsTitle": "Dados da música",
+  "help.songFacts": "Encontrados para você: o tom, o andamento em BPM, o volume, a duração e quanto há de cada instrumento.",
+  "help.wavesTitle": "Formas de onda",
+  "help.waves": "O som de cada instrumento ao longo do tempo. Clique para pular para esse momento. Arraste para repetir esse trecho em loop.",
+  "help.stop": "Para a música.",
+  "help.play": "Toca a música, ou pausa.",
+  "help.loop": "Liga ou desliga o loop: o trecho entre os dois tempos ao lado se repete. A tecla L faz o mesmo.",
+  "help.loopStart": "Onde o loop começa, em segundos. Role sobre ele para mudar.",
+  "help.loopEnd": "Onde o loop termina, em segundos. Role sobre ele para mudar.",
+  "help.speedHalf": "Toca na metade da velocidade. O tom continua o mesmo.",
+  "help.speedSlow": "Toca a três quartos da velocidade. Role sobre ele para escolher qualquer velocidade de 0.50x a 0.99x.",
+  "help.speedNormal": "Toca na velocidade original da música.",
+  "help.keyDown": "Desce a música inteira um semitom, o menor passo na música.",
+  "help.keyUp": "Sobe a música inteira um semitom, o menor passo na música.",
+  "help.keyReset": "Volta cada parte para o tom original da música.",
+  "help.click": "Liga um clique que segue o andamento da música. A tecla K faz o mesmo.",
+  "help.clickVolume": "O volume do clique.",
+  "help.clickMore": "Mais ajustes do clique.",
+  "help.export": "Salva o que você ouve em um único arquivo de áudio. O menu também oferece cada parte em um .zip, ou só o trecho em loop.",
+  "help.set.language": "O idioma do app.",
+  "help.set.maxDuration": "A música mais longa aceita, em minutos.",
+  "help.set.playlistLimit": "O máximo de músicas que uma playlist adiciona.",
+  "help.set.cookies": "Só é preciso se o YouTube pedir para você provar que não é um robô.",
+  "help.set.stemsLocation": "Onde suas músicas separadas ficam guardadas.",
+  "help.set.exportsLocation": "Para onde vão as faixas e loops que você arrasta para fora do StemDeck.",
+  "help.set.autoDelete": "Desligado a menos que você ligue. Apaga músicas depois do número de dias que você escolher.",
+  "help.set.device": "Sua placa de vídeo ou seu processador, para separar.",
+  "help.set.quality": "Best dá faixas mais limpas e leva o dobro do tempo.",
+  "help.set.exportLogs": "Todos os logs em um zip, para anexar a um relatório de bug.",
+  "help.set.resetData": "Apaga todas as músicas. Não pode ser desfeito.",
+  "help.set.acoustid": "Reconhece cada música pelo som, com uma chave grátis do AcoustID.",
+  "help.set.discogs": "Perfis de bandas e lançamentos, com um token grátis do Discogs.",
+  "help.set.transcribe": "Escreve a letra a partir da voz quando nenhuma é encontrada.",
+  "help.set.network": "Abra o StemDeck no seu celular ou tablet, no mesmo Wi-Fi. Leia o QR code ou digite o endereço mostrado.",
+  "help.set.port": "A porta em que o StemDeck roda. Reinicie para aplicar.",
+  "help.set.sampleRate": "A taxa de amostragem dos arquivos de áudio que você exporta.",
+  "help.set.videoQuality": "A qualidade dos vídeos que você exporta.",
+  "help.set.logs": "Onde ficam os logs, e os logs do aplicativo, do servidor e da instalação.",
+  "help.set.registry": "A lista de músicas prontas que o StemDeck guarda no disco. Só leitura.",
 
   "search.ariaLabel": "Pesquisar biblioteca",
   "search.placeholder": "Pesquisar ou #tag…",
@@ -5188,6 +5656,84 @@ const id = {
   "nav.weRecommendLine1": "Rekomen-",
   "nav.weRecommendLine2": "dasi",
   "nav.help": "Bantuan",
+  "help.button": "Jelaskan layar",
+  "help.railLabel": "Panduan",
+  "help.pill": "Mode bantuan: arahkan ke apa saja untuk melihat fungsinya. Esc untuk keluar.",
+  "help.helpMode": "Mode bantuan aktif. Arahkan atau klik apa saja untuk melihat fungsinya. Tekan Esc atau tombol ini untuk keluar.",
+  "help.website": "Membuka stemdeck.app di browser Anda.",
+  "help.upload": "Pilih file audio dari komputer Anda untuk dipisahkan menjadi instrumen.",
+  "help.search": "Ketik nama lagu untuk mencarinya secara online, atau tempel tautan. Anda juga bisa menjatuhkan file audio di sini.",
+  "help.stemAll": "Mengekstrak setiap instrumen dalam lagu.",
+  "help.stemChip": "Klik untuk menyertakan atau melewatkan {name} saat mengekstrak.",
+  "help.vocalCombined": "Menyimpan semua nyanyian dalam satu jalur Vokal.",
+  "help.vocalSplit": "Memisahkan nyanyian menjadi vokal utama dan vokal latar.",
+  "help.detectStructure": "Eksperimental. Jika aktif, lagu berikutnya yang Anda impor ditandai intro, bait, dan reff-nya.",
+  "help.analysisToggle": "Menampilkan atau menyembunyikan baris data lagu: kunci nada, tempo, kekerasan suara, dan lainnya.",
+  "help.sectionsToggle": "Menampilkan atau menyembunyikan bilah bagian, tempat bagian-bagian lagu ditandai.",
+  "help.extract": "Mulai memisahkan lagu menjadi instrumen. Masing-masing mendapat jalurnya sendiri di bawah.",
+  "help.favorite": "Menambahkan lagu yang terbuka ke Favorit, atau mengeluarkannya.",
+  "help.songDetails": "Detail tentang lagu yang terbuka.",
+  "help.toggleLibrary": "Menyembunyikan daftar lagu agar studio lebih luas, atau menampilkannya kembali.",
+  "help.favorites": "Hanya menampilkan lagu yang Anda beri hati.",
+  "help.library": "Menampilkan semua lagu Anda di daftar.",
+  "help.lyrics": "Menampilkan lirik lagu, menyala baris demi baris saat diputar.",
+  "help.trash": "Lagu yang dihapus menunggu di sini sampai Anda mengosongkan Sampah. Angkanya menunjukkan jumlahnya.",
+  "help.queue": "Lagu yang menunggu untuk dipisahkan, sesuai urutan pengerjaannya.",
+  "help.notifications": "Pesan dari StemDeck, seperti rilis baru atau impor yang gagal.",
+  "help.recommend": "Artis, pembuat instrumen, dan peralatan yang layak dikenal. StemDeck tidak menerima uang dari mereka.",
+  "help.about": "Tautan ke situs web, GitHub, dan Discord, serta kredit.",
+  "help.searchLibrary": "Ketik sebagian nama lagu untuk menemukannya. Mulai dengan # untuk mencari menurut tag.",
+  "help.newFolder": "Membuat folder untuk mengatur lagu Anda.",
+  "help.trashedSong": "Lagu yang dihapus. Tahan selama satu detik untuk mengembalikannya.",
+  "help.song": "Klik lagu untuk membukanya di studio.",
+  "help.addSection": "Menambahkan bagian, seperti bait atau reff, ke bilah bagian.",
+  "help.volume": "Geser untuk membuat {name} lebih keras atau lebih pelan.",
+  "help.laneKeyUp": "Menaikkan hanya {name} satu semitone, langkah terkecil dalam musik.",
+  "help.laneKeyDown": "Menurunkan hanya {name} satu semitone, langkah terkecil dalam musik.",
+  "help.laneKeyTitle": "Kunci nada {name}",
+  "help.laneKey": "Kunci nada {name}. K berarti kunci aslinya; angka menunjukkan berapa semitone digeser.",
+  "help.mute": "Membisukan {name}, agar Anda bisa memainkan atau menyanyikan bagian itu sendiri.",
+  "help.solo": "Hanya memutar {name}, agar terdengar jelas.",
+  "help.download": "Menyimpan {name} sebagai file audio tersendiri.",
+  "help.songFactsTitle": "Data lagu",
+  "help.songFacts": "Ditemukan untuk Anda: kunci nada, tempo dalam BPM, kekerasan suara, durasi, dan seberapa banyak tiap instrumen.",
+  "help.wavesTitle": "Bentuk gelombang",
+  "help.waves": "Suara tiap instrumen dari waktu ke waktu. Klik untuk melompat ke saat itu. Seret untuk mengulang bagian itu.",
+  "help.stop": "Menghentikan lagu.",
+  "help.play": "Memutar lagu, atau menjedanya.",
+  "help.loop": "Menyalakan atau mematikan pengulangan: bagian di antara dua waktu di sebelahnya diulang. Tombol L melakukan hal yang sama.",
+  "help.loopStart": "Tempat pengulangan dimulai, dalam detik. Gulir di atasnya untuk memindahkannya.",
+  "help.loopEnd": "Tempat pengulangan berakhir, dalam detik. Gulir di atasnya untuk memindahkannya.",
+  "help.speedHalf": "Memutar dengan setengah kecepatan. Nadanya tetap sama.",
+  "help.speedSlow": "Memutar dengan tiga perempat kecepatan. Gulir di atasnya untuk memilih kecepatan dari 0.50x sampai 0.99x.",
+  "help.speedNormal": "Memutar dengan kecepatan asli lagu.",
+  "help.keyDown": "Menurunkan seluruh lagu satu semitone, langkah terkecil dalam musik.",
+  "help.keyUp": "Menaikkan seluruh lagu satu semitone, langkah terkecil dalam musik.",
+  "help.keyReset": "Mengembalikan setiap bagian ke kunci nada asli lagu.",
+  "help.click": "Menyalakan ketukan yang mengikuti tempo lagu. Tombol K melakukan hal yang sama.",
+  "help.clickVolume": "Seberapa keras ketukannya.",
+  "help.clickMore": "Pengaturan lain untuk ketukan.",
+  "help.export": "Menyimpan apa yang Anda dengar sebagai satu file audio. Menunya juga menawarkan setiap bagian sebagai .zip, atau hanya bagian yang diulang.",
+  "help.set.language": "Bahasa aplikasi.",
+  "help.set.maxDuration": "Lagu terpanjang yang diterima, dalam menit.",
+  "help.set.playlistLimit": "Jumlah lagu terbanyak yang ditambahkan satu playlist.",
+  "help.set.cookies": "Hanya diperlukan jika YouTube meminta Anda membuktikan bahwa Anda bukan bot.",
+  "help.set.stemsLocation": "Tempat lagu yang sudah dipisahkan disimpan.",
+  "help.set.exportsLocation": "Tujuan stem dan loop yang Anda seret keluar dari StemDeck.",
+  "help.set.autoDelete": "Mati kecuali Anda menyalakannya. Menghapus lagu setelah jumlah hari yang Anda tentukan.",
+  "help.set.device": "Kartu grafis atau prosesor Anda, untuk memisahkan.",
+  "help.set.quality": "Best memberi stem yang lebih bersih dan butuh waktu dua kali lipat.",
+  "help.set.exportLogs": "Semua log dalam satu zip, untuk dilampirkan ke laporan bug.",
+  "help.set.resetData": "Menghapus semua lagu. Tidak bisa dibatalkan.",
+  "help.set.acoustid": "Mengenali tiap lagu dari suaranya, dengan kunci AcoustID gratis.",
+  "help.set.discogs": "Profil band dan rilisan, dengan token Discogs gratis.",
+  "help.set.transcribe": "Menuliskan lirik dari vokal saat lirik tidak ditemukan.",
+  "help.set.network": "Buka StemDeck di ponsel atau tablet Anda, di Wi-Fi yang sama. Pindai kode QR, atau ketik alamat yang ditampilkan.",
+  "help.set.port": "Port tempat StemDeck berjalan. Mulai ulang untuk menerapkan.",
+  "help.set.sampleRate": "Sample rate file audio yang Anda ekspor.",
+  "help.set.videoQuality": "Kualitas video yang Anda ekspor.",
+  "help.set.logs": "Lokasi log, serta log aplikasi, backend, dan penyiapan.",
+  "help.set.registry": "Daftar lagu selesai yang disimpan StemDeck di disk. Hanya baca.",
 
   "search.ariaLabel": "Cari pustaka",
   "search.placeholder": "Cari atau #tag…",
@@ -5965,6 +6511,84 @@ const fr = {
   "nav.weRecommendLine1": "Nos",
   "nav.weRecommendLine2": "recommandations",
   "nav.help": "Aide",
+  "help.button": "Expliquer l'écran",
+  "help.railLabel": "Guide",
+  "help.pill": "Mode aide : pointez sur un élément pour voir ce qu'il fait. Échap pour quitter.",
+  "help.helpMode": "Le mode aide est activé. Pointez ou cliquez sur un élément pour voir ce qu'il fait. Échap ou ce bouton pour quitter.",
+  "help.website": "Ouvre stemdeck.app dans votre navigateur.",
+  "help.upload": "Choisissez un fichier audio sur votre ordinateur pour le séparer en instruments.",
+  "help.search": "Tapez le nom d'un morceau pour le chercher en ligne, ou collez un lien. Vous pouvez aussi déposer un fichier audio ici.",
+  "help.stemAll": "Extrait tous les instruments du morceau.",
+  "help.stemChip": "Cliquez pour inclure ou exclure {name} lors de l'extraction.",
+  "help.vocalCombined": "Garde tout le chant dans une seule piste Voix.",
+  "help.vocalSplit": "Sépare le chant en voix principale et chœurs.",
+  "help.detectStructure": "Expérimental. Activé, le prochain morceau importé reçoit son intro, ses couplets et ses refrains marqués.",
+  "help.analysisToggle": "Affiche ou masque la ligne d'infos du morceau : tonalité, tempo, volume et plus.",
+  "help.sectionsToggle": "Affiche ou masque la barre des sections, où les parties du morceau sont marquées.",
+  "help.extract": "Lance la séparation du morceau en instruments. Chacun obtient sa propre piste en dessous.",
+  "help.favorite": "Ajoute le morceau ouvert aux Favoris, ou l'en retire.",
+  "help.songDetails": "Détails sur le morceau ouvert.",
+  "help.toggleLibrary": "Masque la liste des morceaux pour agrandir le studio, ou la fait revenir.",
+  "help.favorites": "Affiche seulement les morceaux auxquels vous avez donné un cœur.",
+  "help.library": "Affiche tous vos morceaux dans la liste.",
+  "help.lyrics": "Affiche les paroles, éclairées ligne par ligne pendant la lecture.",
+  "help.trash": "Les morceaux supprimés attendent ici jusqu'à ce que vous vidiez la corbeille. Le nombre indique combien il y en a.",
+  "help.queue": "Les morceaux qui attendent d'être séparés, dans l'ordre où ils seront traités.",
+  "help.notifications": "Messages de StemDeck, comme une nouvelle version ou un import qui a échoué.",
+  "help.recommend": "Artistes, luthiers et matériel à connaître. StemDeck ne reçoit d'argent d'aucun d'eux.",
+  "help.about": "Liens vers le site, GitHub et Discord, et les crédits.",
+  "help.searchLibrary": "Tapez une partie du nom d'un morceau pour le trouver. Commencez par # pour chercher par tag.",
+  "help.newFolder": "Crée un dossier pour ranger vos morceaux.",
+  "help.trashedSong": "Un morceau supprimé. Maintenez-le une seconde pour le récupérer.",
+  "help.song": "Cliquez sur un morceau pour l'ouvrir dans le studio.",
+  "help.addSection": "Ajoute une section, comme un couplet ou un refrain, à la barre des sections.",
+  "help.volume": "Faites glisser pour rendre {name} plus fort ou plus faible.",
+  "help.laneKeyUp": "Monte seulement {name} d'un demi-ton, le plus petit pas en musique.",
+  "help.laneKeyDown": "Descend seulement {name} d'un demi-ton, le plus petit pas en musique.",
+  "help.laneKeyTitle": "Tonalité de {name}",
+  "help.laneKey": "La tonalité de {name}. K signifie sa tonalité d'origine ; un nombre indique de combien de demi-tons elle a bougé.",
+  "help.mute": "Coupe {name}, pour que vous puissiez jouer ou chanter cette partie vous-même.",
+  "help.solo": "Joue seulement {name}, pour l'entendre clairement.",
+  "help.download": "Enregistre {name} comme fichier audio séparé.",
+  "help.songFactsTitle": "Infos du morceau",
+  "help.songFacts": "Trouvés pour vous : la tonalité, le tempo en BPM, le volume, la durée et la présence de chaque instrument.",
+  "help.wavesTitle": "Formes d'onde",
+  "help.waves": "Le son de chaque instrument dans le temps. Cliquez pour aller à ce moment. Faites glisser pour boucler ce passage.",
+  "help.stop": "Arrête le morceau.",
+  "help.play": "Lance le morceau, ou le met en pause.",
+  "help.loop": "Active ou désactive la boucle : le passage entre les deux temps à côté se répète. La touche L fait de même.",
+  "help.loopStart": "Où la boucle commence, en secondes. Faites défiler dessus pour la déplacer.",
+  "help.loopEnd": "Où la boucle finit, en secondes. Faites défiler dessus pour la déplacer.",
+  "help.speedHalf": "Joue à mi-vitesse. La hauteur ne change pas.",
+  "help.speedSlow": "Joue aux trois quarts de la vitesse. Faites défiler dessus pour choisir une vitesse de 0.50x à 0.99x.",
+  "help.speedNormal": "Joue à la vitesse d'origine du morceau.",
+  "help.keyDown": "Descend tout le morceau d'un demi-ton, le plus petit pas en musique.",
+  "help.keyUp": "Monte tout le morceau d'un demi-ton, le plus petit pas en musique.",
+  "help.keyReset": "Remet chaque partie dans la tonalité d'origine du morceau.",
+  "help.click": "Active un clic qui suit le tempo du morceau. La touche K fait de même.",
+  "help.clickVolume": "Le volume du clic.",
+  "help.clickMore": "Plus de réglages pour le clic.",
+  "help.export": "Enregistre ce que vous entendez dans un seul fichier audio. Son menu propose aussi chaque partie en .zip, ou seulement le passage en boucle.",
+  "help.set.language": "La langue de l'application.",
+  "help.set.maxDuration": "Le morceau le plus long accepté, en minutes.",
+  "help.set.playlistLimit": "Le nombre maximum de morceaux qu'ajoute une playlist.",
+  "help.set.cookies": "Utile seulement si YouTube vous demande de prouver que vous n'êtes pas un robot.",
+  "help.set.stemsLocation": "Où sont stockés vos morceaux séparés.",
+  "help.set.exportsLocation": "Où vont les pistes et boucles que vous faites glisser hors de StemDeck.",
+  "help.set.autoDelete": "Désactivé sauf si vous l'activez. Supprime les morceaux après le nombre de jours choisi.",
+  "help.set.device": "Votre carte graphique ou votre processeur, pour la séparation.",
+  "help.set.quality": "Best donne des pistes plus propres et prend deux fois plus de temps.",
+  "help.set.exportLogs": "Tous les journaux dans un zip, à joindre à un rapport de bug.",
+  "help.set.resetData": "Supprime tous les morceaux. Impossible à annuler.",
+  "help.set.acoustid": "Reconnaît chaque morceau à son son, avec une clé AcoustID gratuite.",
+  "help.set.discogs": "Profils de groupes et sorties, avec un jeton Discogs gratuit.",
+  "help.set.transcribe": "Écrit les paroles à partir du chant quand aucune n'est trouvée.",
+  "help.set.network": "Ouvrez StemDeck sur votre téléphone ou tablette, sur le même Wi-Fi. Scannez le QR code ou tapez l'adresse affichée.",
+  "help.set.port": "Le port sur lequel StemDeck tourne. Redémarrez pour appliquer.",
+  "help.set.sampleRate": "La fréquence d'échantillonnage des fichiers audio exportés.",
+  "help.set.videoQuality": "La qualité des vidéos exportées.",
+  "help.set.logs": "Où sont les journaux, et les journaux de l'application, du serveur et de l'installation.",
+  "help.set.registry": "La liste des morceaux terminés que StemDeck garde sur le disque. Lecture seule.",
 
   "search.ariaLabel": "Rechercher dans la bibliothèque",
   "search.placeholder": "Rechercher ou #tag…",
@@ -6927,6 +7551,84 @@ const es = {
   "nav.weRecommendLine1": "Reco-",
   "nav.weRecommendLine2": "mendamos",
   "nav.help": "Ayuda",
+  "help.button": "Explicar la pantalla",
+  "help.railLabel": "Guía",
+  "help.pill": "Modo ayuda: señala cualquier cosa para ver qué hace. Esc para salir.",
+  "help.helpMode": "El modo ayuda está activado. Señala o haz clic en algo para ver qué hace. Pulsa Esc o este botón para salir.",
+  "help.website": "Abre stemdeck.app en tu navegador.",
+  "help.upload": "Elige un archivo de audio de tu ordenador para separarlo en sus instrumentos.",
+  "help.search": "Escribe el nombre de una canción para buscarla en línea, o pega un enlace. También puedes soltar aquí un archivo de audio.",
+  "help.stemAll": "Extrae todos los instrumentos de la canción.",
+  "help.stemChip": "Haz clic para incluir o dejar fuera {name} al extraer.",
+  "help.vocalCombined": "Mantiene todo el canto en una sola pista de Voces.",
+  "help.vocalSplit": "Separa el canto en la voz principal y los coros.",
+  "help.detectStructure": "Experimental. Activado, la próxima canción que importes tendrá marcados la intro, las estrofas y los estribillos.",
+  "help.analysisToggle": "Muestra u oculta la fila de datos de la canción: tonalidad, tempo, volumen y más.",
+  "help.sectionsToggle": "Muestra u oculta la barra de secciones, donde se marcan las partes de la canción.",
+  "help.extract": "Empieza a separar la canción en sus instrumentos. Cada uno tiene su propia pista abajo.",
+  "help.favorite": "Añade la canción abierta a Favoritos, o la quita.",
+  "help.songDetails": "Detalles de la canción abierta.",
+  "help.toggleLibrary": "Oculta la lista de canciones para dar más espacio al estudio, o la vuelve a mostrar.",
+  "help.favorites": "Muestra solo las canciones a las que diste un corazón.",
+  "help.library": "Muestra todas tus canciones en la lista.",
+  "help.lyrics": "Muestra la letra, iluminada línea a línea mientras suena.",
+  "help.trash": "Las canciones borradas esperan aquí hasta que vacíes la papelera. El número indica cuántas hay.",
+  "help.queue": "Las canciones que esperan para separarse, en el orden en que se harán.",
+  "help.notifications": "Mensajes de StemDeck, como una nueva versión o una importación que falló.",
+  "help.recommend": "Artistas, luthiers y equipo que vale la pena conocer. StemDeck no recibe dinero de ninguno de ellos.",
+  "help.about": "Enlaces a la web, GitHub y Discord, y los créditos.",
+  "help.searchLibrary": "Escribe parte del nombre de una canción para encontrarla. Empieza con # para buscar por etiqueta.",
+  "help.newFolder": "Crea una carpeta para ordenar tus canciones.",
+  "help.trashedSong": "Una canción borrada. Mantenla pulsada un segundo para recuperarla.",
+  "help.song": "Haz clic en una canción para abrirla en el estudio.",
+  "help.addSection": "Añade una sección, como una estrofa o un estribillo, a la barra de secciones.",
+  "help.volume": "Arrastra para subir o bajar el volumen de {name}.",
+  "help.laneKeyUp": "Sube solo {name} un semitono, el paso más pequeño en música.",
+  "help.laneKeyDown": "Baja solo {name} un semitono, el paso más pequeño en música.",
+  "help.laneKeyTitle": "Tonalidad de {name}",
+  "help.laneKey": "La tonalidad de {name}. K es su tonalidad original; un número indica cuántos semitonos se movió.",
+  "help.mute": "Silencia {name}, para que puedas tocar o cantar esa parte tú.",
+  "help.solo": "Reproduce solo {name}, para oírlo con claridad.",
+  "help.download": "Guarda {name} como un archivo de audio aparte.",
+  "help.songFactsTitle": "Datos de la canción",
+  "help.songFacts": "Calculados para ti: la tonalidad, el tempo en BPM, el volumen, la duración y cuánto hay de cada instrumento.",
+  "help.wavesTitle": "Formas de onda",
+  "help.waves": "El sonido de cada instrumento a lo largo del tiempo. Haz clic para saltar a ese momento. Arrastra para repetir esa parte en bucle.",
+  "help.stop": "Detiene la canción.",
+  "help.play": "Reproduce la canción, o la pausa.",
+  "help.loop": "Activa o desactiva el bucle: la parte entre los dos tiempos de al lado se repite. La tecla L hace lo mismo.",
+  "help.loopStart": "Dónde empieza el bucle, en segundos. Desplaza la rueda encima para moverlo.",
+  "help.loopEnd": "Dónde termina el bucle, en segundos. Desplaza la rueda encima para moverlo.",
+  "help.speedHalf": "Reproduce a media velocidad. El tono no cambia.",
+  "help.speedSlow": "Reproduce a tres cuartos de velocidad. Desplaza la rueda encima para elegir cualquier velocidad de 0.50x a 0.99x.",
+  "help.speedNormal": "Reproduce a la velocidad original de la canción.",
+  "help.keyDown": "Baja toda la canción un semitono, el paso más pequeño en música.",
+  "help.keyUp": "Sube toda la canción un semitono, el paso más pequeño en música.",
+  "help.keyReset": "Devuelve cada parte a la tonalidad original de la canción.",
+  "help.click": "Activa un clic que sigue el tempo de la canción. La tecla K hace lo mismo.",
+  "help.clickVolume": "El volumen del clic.",
+  "help.clickMore": "Más ajustes del clic.",
+  "help.export": "Guarda lo que oyes como un solo archivo de audio. Su menú también ofrece cada parte en un .zip, o solo la parte en bucle.",
+  "help.set.language": "El idioma de la aplicación.",
+  "help.set.maxDuration": "La canción más larga que acepta, en minutos.",
+  "help.set.playlistLimit": "El máximo de canciones que añade una lista de reproducción.",
+  "help.set.cookies": "Solo hace falta si YouTube te pide demostrar que no eres un bot.",
+  "help.set.stemsLocation": "Dónde se guardan tus canciones separadas.",
+  "help.set.exportsLocation": "Adónde van las pistas y bucles que arrastras fuera de StemDeck.",
+  "help.set.autoDelete": "Desactivado salvo que lo actives. Borra canciones tras el número de días que elijas.",
+  "help.set.device": "Tu tarjeta gráfica o tu procesador, para separar.",
+  "help.set.quality": "Best da pistas más limpias y tarda el doble.",
+  "help.set.exportLogs": "Todos los registros en un zip, para adjuntar a un informe de error.",
+  "help.set.resetData": "Borra todas las canciones. No se puede deshacer.",
+  "help.set.acoustid": "Reconoce cada canción por su sonido, con una clave gratuita de AcoustID.",
+  "help.set.discogs": "Perfiles de bandas y lanzamientos, con un token gratuito de Discogs.",
+  "help.set.transcribe": "Escribe la letra a partir de la voz cuando no se encuentra ninguna.",
+  "help.set.network": "Abre StemDeck en tu móvil o tableta, en la misma Wi-Fi. Escanea el código QR o escribe la dirección que aparece.",
+  "help.set.port": "El puerto en el que funciona StemDeck. Reinicia para aplicarlo.",
+  "help.set.sampleRate": "La frecuencia de muestreo de los archivos de audio que exportas.",
+  "help.set.videoQuality": "La calidad de los vídeos que exportas.",
+  "help.set.logs": "Dónde están los registros, y los registros de la aplicación, del servidor y de la instalación.",
+  "help.set.registry": "La lista de canciones terminadas que StemDeck guarda en el disco. Solo lectura.",
 
   "search.ariaLabel": "Buscar en la biblioteca",
   "search.placeholder": "Busca o #etiqueta…",
@@ -7738,6 +8440,84 @@ const ko = {
   "nav.weRecommendLine1": "이런 곳도",
   "nav.weRecommendLine2": "추천해요",
   "nav.help": "도움말",
+  "help.button": "화면 설명",
+  "help.railLabel": "가이드",
+  "help.pill": "도움말 모드: 아무 항목이나 가리키면 하는 일을 보여 줘요. Esc로 나가요.",
+  "help.helpMode": "도움말 모드가 켜져 있어요. 아무 항목이나 가리키거나 클릭하면 하는 일을 보여 줘요. Esc나 이 버튼으로 끌 수 있어요.",
+  "help.website": "브라우저에서 stemdeck.app을 열어요.",
+  "help.upload": "컴퓨터에서 오디오 파일을 골라 악기별로 나눠요.",
+  "help.search": "곡 이름을 입력해 온라인에서 찾거나 링크를 붙여 넣어요. 오디오 파일을 여기에 놓을 수도 있어요.",
+  "help.stemAll": "곡에 있는 모든 악기를 추출해요.",
+  "help.stemChip": "클릭해서 추출할 때 {name}을(를) 넣거나 뺄 수 있어요.",
+  "help.vocalCombined": "모든 노래를 보컬 레인 하나에 담아요.",
+  "help.vocalSplit": "노래를 리드 보컬과 백 보컬로 나눠요.",
+  "help.detectStructure": "실험 기능이에요. 켜면 다음에 가져오는 곡의 인트로, 벌스, 코러스가 표시돼요.",
+  "help.analysisToggle": "키, 템포, 음량 등 곡 정보 줄을 보이거나 숨겨요.",
+  "help.sectionsToggle": "곡의 구간이 표시되는 섹션 막대를 보이거나 숨겨요.",
+  "help.extract": "곡을 악기별로 나누기 시작해요. 악기마다 아래에 레인이 생겨요.",
+  "help.favorite": "열린 곡을 즐겨찾기에 넣거나 빼요.",
+  "help.songDetails": "열린 곡의 자세한 정보예요.",
+  "help.toggleLibrary": "곡 목록을 숨겨 스튜디오를 넓게 쓰거나 다시 보여 줘요.",
+  "help.favorites": "하트를 누른 곡만 보여 줘요.",
+  "help.library": "목록에 모든 곡을 보여 줘요.",
+  "help.lyrics": "곡의 가사를 보여 주고, 재생에 맞춰 한 줄씩 밝혀 줘요.",
+  "help.trash": "삭제한 곡은 휴지통을 비울 때까지 여기에 있어요. 숫자는 곡 수예요.",
+  "help.queue": "분리를 기다리는 곡이에요. 처리될 순서대로 있어요.",
+  "help.notifications": "새 버전이나 실패한 가져오기 같은 StemDeck의 알림이에요.",
+  "help.recommend": "알아 두면 좋은 아티스트, 악기 제작자, 장비예요. StemDeck은 이들 누구에게서도 돈을 받지 않아요.",
+  "help.about": "웹사이트, GitHub, Discord 링크와 크레딧이에요.",
+  "help.searchLibrary": "곡 이름 일부를 입력해 찾아요. #으로 시작하면 태그로 찾아요.",
+  "help.newFolder": "곡을 정리할 폴더를 만들어요.",
+  "help.trashedSong": "삭제한 곡이에요. 1초 동안 누르고 있으면 되살아나요.",
+  "help.song": "곡을 클릭하면 스튜디오에서 열려요.",
+  "help.addSection": "벌스나 코러스 같은 구간을 섹션 막대에 추가해요.",
+  "help.volume": "끌어서 {name} 소리를 키우거나 줄여요.",
+  "help.laneKeyUp": "{name}만 반음 올려요. 반음은 음악에서 가장 작은 음 간격이에요.",
+  "help.laneKeyDown": "{name}만 반음 내려요. 반음은 음악에서 가장 작은 음 간격이에요.",
+  "help.laneKeyTitle": "{name}의 키",
+  "help.laneKey": "{name}의 키예요. K는 원래 키이고, 숫자는 몇 반음 옮겼는지 보여 줘요.",
+  "help.mute": "{name} 소리를 꺼서 그 부분을 직접 연주하거나 부를 수 있게 해요.",
+  "help.solo": "{name}만 재생해서 또렷하게 들려줘요.",
+  "help.download": "{name}을(를) 별도의 오디오 파일로 저장해요.",
+  "help.songFactsTitle": "곡 정보",
+  "help.songFacts": "자동으로 찾아 줘요: 키, BPM 단위의 템포, 음량, 길이, 그리고 악기별 비중이에요.",
+  "help.wavesTitle": "파형",
+  "help.waves": "악기마다 소리를 시간에 따라 그린 거예요. 클릭하면 그 순간으로 가고, 끌면 그 부분을 반복해요.",
+  "help.stop": "곡을 멈춰요.",
+  "help.play": "곡을 재생하거나 일시 정지해요.",
+  "help.loop": "반복을 켜거나 꺼요. 옆의 두 시간 사이가 반복돼요. L 키도 같아요.",
+  "help.loopStart": "반복이 시작하는 곳이에요(초). 위에서 스크롤하면 옮길 수 있어요.",
+  "help.loopEnd": "반복이 끝나는 곳이에요(초). 위에서 스크롤하면 옮길 수 있어요.",
+  "help.speedHalf": "절반 속도로 재생해요. 음높이는 그대로예요.",
+  "help.speedSlow": "4분의 3 속도로 재생해요. 위에서 스크롤하면 0.50x에서 0.99x까지 고를 수 있어요.",
+  "help.speedNormal": "곡의 원래 속도로 재생해요.",
+  "help.keyDown": "곡 전체를 반음 내려요. 반음은 음악에서 가장 작은 음 간격이에요.",
+  "help.keyUp": "곡 전체를 반음 올려요. 반음은 음악에서 가장 작은 음 간격이에요.",
+  "help.keyReset": "모든 부분을 곡의 원래 키로 되돌려요.",
+  "help.click": "곡의 템포를 따라가는 클릭을 켜요. K 키도 같아요.",
+  "help.clickVolume": "클릭 소리의 크기예요.",
+  "help.clickMore": "클릭의 다른 설정이에요.",
+  "help.export": "들리는 그대로 오디오 파일 하나로 저장해요. 메뉴에서 모든 부분을 .zip으로, 또는 반복 구간만 저장할 수도 있어요.",
+  "help.set.language": "앱의 언어예요.",
+  "help.set.maxDuration": "받아들이는 가장 긴 곡 길이예요(분).",
+  "help.set.playlistLimit": "재생목록 하나가 추가하는 최대 곡 수예요.",
+  "help.set.cookies": "YouTube가 봇이 아님을 확인해 달라고 할 때만 필요해요.",
+  "help.set.stemsLocation": "분리한 곡을 저장하는 곳이에요.",
+  "help.set.exportsLocation": "StemDeck 밖으로 끌어낸 스템과 루프가 저장되는 곳이에요.",
+  "help.set.autoDelete": "직접 켜기 전에는 꺼져 있어요. 정한 날짜가 지나면 곡을 삭제해요.",
+  "help.set.device": "분리에 쓰는 그래픽 카드나 프로세서예요.",
+  "help.set.quality": "Best는 스템이 더 깨끗하고 시간이 두 배 걸려요.",
+  "help.set.exportLogs": "모든 로그를 zip 하나로 묶어요. 버그 신고에 첨부할 수 있어요.",
+  "help.set.resetData": "모든 곡을 삭제해요. 되돌릴 수 없어요.",
+  "help.set.acoustid": "무료 AcoustID 키로 소리를 듣고 곡을 알아봐요.",
+  "help.set.discogs": "무료 Discogs 토큰으로 밴드 프로필과 발매 정보를 가져와요.",
+  "help.set.transcribe": "가사를 찾지 못하면 보컬에서 가사를 받아 적어요.",
+  "help.set.network": "같은 Wi-Fi에 있는 휴대폰이나 태블릿에서 StemDeck을 열어요. QR 코드를 찍거나 표시된 주소를 입력해요.",
+  "help.set.port": "StemDeck이 실행되는 포트예요. 다시 시작하면 적용돼요.",
+  "help.set.sampleRate": "내보내는 오디오 파일의 샘플 레이트예요.",
+  "help.set.videoQuality": "내보내는 동영상의 화질이에요.",
+  "help.set.logs": "로그 위치와 앱, 백엔드, 설치 로그예요.",
+  "help.set.registry": "StemDeck이 디스크에 보관하는 완료된 곡 목록이에요. 읽기 전용이에요.",
 
   "search.ariaLabel": "라이브러리 검색",
   "search.placeholder": "검색 또는 #태그…",
diff --git a/static/js/main.js b/static/js/main.js
index fccb50fd..684d650f 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -21,6 +21,7 @@ import { initI18n, applyTranslations, t, plural, onLanguageChange } from "./i18n
 import { initFooterFit, refitFooter } from "./footerFit.js";
 import { initArtistInfo } from "./artistInfo.js";
 import { initLyrics } from "./lyrics.js";
+import { initHelpMode } from "./helpMode.js";
 
 // ─── Stem choice toggles on the import page ───
 //
@@ -456,6 +457,7 @@ wireAppShellControls();
 initFooterFit();
 initArtistInfo();
 initLyrics();
+initHelpMode();
 // Re-measure after a language switch. Measured across en/fr/de/pl the strip
 // came out the same width in all four, because the group labels are 10px
 // uppercase and narrower than the controls under them, so this is not the
diff --git a/tests/e2e/help-mode.spec.mjs b/tests/e2e/help-mode.spec.mjs
new file mode 100644
index 00000000..cdf7ac3b
--- /dev/null
+++ b/tests/e2e/help-mode.spec.mjs
@@ -0,0 +1,99 @@
+// Help mode: Guide in the rail, below Trash, makes the studio explain itself. Every
+// control it covers shows an outline, pointing at one shows a box with its
+// name and what it does, and a click while help mode is on explains instead of
+// acting.
+
+import { test, expect } from "@playwright/test";
+
+import { openStudio } from "./helpers.mjs";
+
+const tip = (page) => page.locator("#helpTip");
+
+async function helpOn(page) {
+  await page.locator("#helpModeBtn").click();
+  await expect(page.locator("body")).toHaveClass(/help-mode/);
+  await expect(page.locator("#helpModeBtn")).toHaveAttribute("aria-pressed", "true");
+  await expect(page.locator(".help-pill")).toBeVisible();
+}
+
+test.describe("help mode", () => {
+  test("Guide turns it on, and Esc or Guide turns it off", async ({ page }) => {
+    await openStudio(page);
+    await helpOn(page);
+    await page.keyboard.press("Escape");
+    await expect(page.locator("body")).not.toHaveClass(/help-mode/);
+    await helpOn(page);
+    await page.locator("#helpModeBtn").click();
+    await expect(page.locator("body")).not.toHaveClass(/help-mode/);
+    await expect(page.locator(".help-target")).toHaveCount(0);
+    await expect(page.locator(".help-pill")).toBeHidden();
+  });
+
+  test("pointing at a control explains it, under its own label", async ({ page }) => {
+    await openStudio(page);
+    await helpOn(page);
+    await page.locator("#t-speed-075").hover();
+    await expect(tip(page)).toBeVisible();
+    await expect(tip(page).locator("b")).toHaveText("0.75x");
+    await expect(tip(page)).toContainText("three-quarter speed");
+    await expect(page.locator("#t-speed-075")).toHaveClass(/help-current/);
+  });
+
+  test("a lane's control names its instrument", async ({ page }) => {
+    await openStudio(page);
+    await helpOn(page);
+    const drumsMute = page.locator(".mx-row, .lane-header").filter({ hasText: "Drums" }).locator(".mx-btn.mute").first();
+    await drumsMute.hover();
+    await expect(tip(page)).toContainText("Silences Drums");
+    // Headed by what the button does, not by its one letter.
+    await expect(tip(page).locator("b")).toHaveText("Mute Drums");
+
+    const drumsKey = page.locator(".lane-key").filter({ has: page.locator('[aria-label*="Drums"]') }).locator(".lane-key-value").first();
+    await drumsKey.hover({ force: true });
+    await expect(tip(page).locator("b")).toHaveText("Key of Drums");
+  });
+
+  test("a click explains instead of acting", async ({ page }) => {
+    await openStudio(page);
+    await helpOn(page);
+    const fav = page.locator("#fav-btn");
+    await expect(fav).toHaveAttribute("aria-pressed", "false");
+    await fav.click();
+    await expect(tip(page)).toContainText("Favorites");
+    await expect(fav).toHaveAttribute("aria-pressed", "false");
+
+    // Off again, the same click works.
+    await page.keyboard.press("Escape");
+    await fav.click();
+    await expect(fav).toHaveAttribute("aria-pressed", "true");
+  });
+
+  test("Settings lists every tab and its options", async ({ page }) => {
+    await openStudio(page);
+    await helpOn(page);
+    await page.locator("#settingsBtn").hover();
+    for (const text of ["General", "Song details", "Network", "Export", "Logs", "Registry", "Port", "Compute device", "Make StemDeck available on your network"]) {
+      await expect(tip(page)).toContainText(text);
+    }
+  });
+
+  test("every outlined control has a title and a real explanation", async ({ page }) => {
+    await openStudio(page);
+    await helpOn(page);
+    const targets = page.locator(".help-target");
+    const count = await targets.count();
+    expect(count).toBeGreaterThan(40);
+    const bad = [];
+    for (let i = 0; i < count; i++) {
+      const el = targets.nth(i);
+      if (!(await el.isVisible())) continue;
+      // Hover the centre of the box, which for the small lane steppers is the
+      // only point not shared with a neighbour.
+      await el.hover({ force: true });
+      const title = (await tip(page).locator("b").textContent())?.trim();
+      const text = (await tip(page).textContent())?.trim();
+      if (!title || !text || /help\.|\{name\}/.test(text) || text === title) bad.push({ i, title, text });
+    }
+    expect(bad).toEqual([]);
+  });
+});