feedback5: merge UI-TW — the Traditional Chinese interface (all msgids converted with OpenCC cn → twp, the official TW terms, a manual pass) and the machine-translation mark (_meta.machineTranslated → the pack index → a note under the language switch in 设置); golden unchanged

public/i18n/en.json

@@ -789,6 +789,7 @@
   "出售选中干员": "Sell selected Operator",
   "取消 / 关闭": "Cancel / Close",
   "语言": "Language",
+  "当前语言的界面文字为机器翻译，可能不够准确，欢迎在 GitHub 上指正。": "The interface text in this language is machine-translated and may be inaccurate. Corrections are welcome on GitHub.",
   "右键查看详情": "Right-click for details",
   "刷新商店": "Refresh Shop",
   "冻结 / 解冻商店": "Freeze / Unfreeze Shop",

public/js/ui/lang.js

@@ -15,7 +15,7 @@
 
 import { useEffect, useState } from '../../vendor/hooks.module.js';
 import {
-  DEFAULT_LANG, normalizeLang, getLang, setLang, onLangChange, addMessages, setNameResolver, tName, format, translateWire, t,
+  DEFAULT_LANG, normalizeLang, getLang, setLang, onLangChange, addMessages, setNameResolver, tName, format, translateWire, t, N_,
   registerLangs, getLangs, langInfo, langChain, onLangsChange, setI18nWarn,
 } from '../../../shared/i18n.js';
 import { canonicalLang, computeChain, scriptOf } from '../../../shared/i18nPacks.js';
@@ -270,6 +270,19 @@ export function langMenuModel(langs, current) {
   return { kind: items.length > SEGMENTED_MAX ? 'select' : 'buttons', items };
 }
 
+/** The note itself (a msgid: each pack words it in its own language). */
+const MACHINE_TRANSLATION_NOTE = N_('当前语言的界面文字为机器翻译，可能不够准确，欢迎在 GitHub 上指正。');
+
+/**
+ * The note under the language switch in 设置 (ui/settings.js): while the current language's pack is marked as a machine
+ * translation (`_meta.machineTranslated`, docs/PACKS.md) it says so, in that language; null otherwise (Chinese, English,
+ * a pack translated by hand). Only the current pack counts, not its base or fallbacks.
+ * @returns {string | null}
+ */
+export function machineTranslationNote() {
+  return langInfo(getLang())?.machineTranslated === true ? t(MACHINE_TRANSLATION_NOTE) : null;
+}
+
 /**
  * The language menu: 中文 | English | … as buttons, or a list when there are many packs.
  * @param {{ class?: string }} props

public/js/ui/settings.js

@@ -1,6 +1,7 @@
 // Player settings (BGM/SFX/voice volume, mute, damage numbers, render quality, the shortcut keys): a tiny observable
 // store persisted in localStorage (`sp.pref.settings`), applied to the audio manager on every change, plus
-// the settings modal — which also holds the language switch (ui/lang.js; kept apart in `sp.pref.lang`) and the 快捷键
+// the settings modal — which also holds the language switch (ui/lang.js; kept apart in `sp.pref.lang`; under it a note
+// while the current language's pack is a machine translation, `_meta.machineTranslated`) and the 快捷键
 // section that rebinds the in-match shortcuts (the key map: ui/gameLogic/shortcuts.js; the community request
 // 「快捷键可不可以自己设置」, the owner's decision of 2026-10-07).
 
@@ -11,7 +12,7 @@ import { sanitizeSettings, HOTKEY_ACTIONS, DEFAULT_HOTKEYS, hotkeyLabel, rebindH
 import { audio } from '../audio.js';
 import { openGuide } from './guide.js';
 import { detectFeatures } from './device.js';
-import { LangToggle } from './lang.js';
+import { LangToggle, machineTranslationNote } from './lang.js';
 import { t, tc, N_ } from '../../../shared/i18n.js';
 
 const cx = (...p) => p.flat().filter(Boolean).join(' ');
@@ -151,6 +152,7 @@ export function SettingsModal({ open, onClose }) {
   const s = useSettings();
   const [tested, setTested] = useState(false);
   const [touchUi] = useState(() => detectFeatures().coarse && !detectFeatures().fine);
+  const mtNote = machineTranslationNote(); // a pack marked as machine translation says so under the switch
   return html`<${Modal} open=${open} onClose=${onClose} title=${t('设置')} micro="SETTINGS" width="7.4rem"
     actions=${html`<${Button} variant="secondary" icon="book" class="set-guide" onClick=${() => openGuide(0)}>${t('玩法说明')}<//>
       <${Button} variant="primary" icon="check" onClick=${onClose}>${t('完成')}<//>`}>
@@ -159,6 +161,7 @@ export function SettingsModal({ open, onClose }) {
         <span class="set-row__label">${t('语言')}<${MicroLabel}>LANGUAGE<//></span>
         <${LangToggle} class="set-lang" />
       </div>
+      ${mtNote ? html`<p class="set-hint set-lang-note" data-testid="lang-mt-note">${mtNote}</p>` : null}
       <${Slider} label=${t('背景音乐')} micro="BGM" icon="play" value=${s.bgm} onInput=${(v) => updateSettings({ bgm: v })} />
       <${Slider} label=${t('干员语音')} micro="VOICE" icon="mic" value=${s.voice} onInput=${(v) => updateSettings({ voice: v })} />
       <${Slider} label=${t('音效')} micro="SFX" icon="signal" value=${s.sfx}