diff --git a/docs/I18N.md b/docs/I18N.md
index 7e5bdf95..7b3dcfbf 100644
--- a/docs/I18N.md
+++ b/docs/I18N.md
@@ -40,7 +40,8 @@ html`<span>${tParts('第 {r} 回合 · 最终攻势', { r: html`<b class="num">$
   current language (§2). Do not wrap them in `t()`.
 - **Re-rendering**: `main.js` App subscribes with `useLang()` (`public/js/ui/lang.js`), so the whole tree re-renders on a
   switch. A component that caches text outside rendering (a `useMemo` returning text, a module-level string) must
-  depend on the language (`useLang()`) or move the `t()` call into rendering.
+  depend on the language (`useLang()`) or move the `t()` call into rendering; a memo over data records (the roster, the
+  strategy list, `useGameData()`) lists `data.locale()` among its dependencies, so the game texts follow the switch.
 - Font samples, data keys and other Chinese that is not UI text can carry `// i18n-ignore` on the line.
 
 ### Translating
diff --git a/public/js/screens/bandDraft.js b/public/js/screens/bandDraft.js
index 0f0b3a03..46d9e791 100644
--- a/public/js/screens/bandDraft.js
+++ b/public/js/screens/bandDraft.js
@@ -179,7 +179,7 @@ export function BandDraftScreen() {
   const mode = gd.config?.modes?.[pub?.modeId];
   const offBonds = modeOffBonds(mode); // the bonds this mode never activates (标准: 10 of 23)
   const solo = roomSolo || mode?.type === 'SINGLE' || String(pub?.modeId || '').includes('single');
-  const bands = useMemo(() => allowedBands(gd.list('bands'), mode?.type || (solo ? 'SINGLE' : 'MULTI')), [gd.ready, mode?.type, solo]);
+  const bands = useMemo(() => allowedBands(gd.list('bands'), mode?.type || (solo ? 'SINGLE' : 'MULTI')), [gd.ready, mode?.type, solo, data.locale()]);
   const players = sortedPlayers(pub);
   const draft = normalizeDraft(pub?.draft, players);
   const myPick = draft.picks.get(myId) || priv?.bandId || null;
diff --git a/public/js/screens/game.js b/public/js/screens/game.js
index ab58efca..43563c64 100644
--- a/public/js/screens/game.js
+++ b/public/js/screens/game.js
@@ -1044,7 +1044,7 @@ function MatchScreen() {
     const u = (Array.isArray(field?.units) ? field.units : []).find((x) => x && x.id === detail.unitId);
     return u ? { ...detail, unit: u } : detail;
   }, [detail, field]);
-  const resolved = useMemo(() => resolveDetail(detailTarget, placeCtx.pieces, { priv, backups: gd.backups }), [detailTarget, placeCtx, gd.ready]);
+  const resolved = useMemo(() => resolveDetail(detailTarget, placeCtx.pieces, { priv, backups: gd.backups }), [detailTarget, placeCtx, gd.ready, data.locale()]);
   useEffect(() => { if (detail && !resolved && detail.kind === 'piece') setDetail(null); }, [resolved]);
   const snapHp = (() => {
     const id = resolved?.unitId;
diff --git a/public/js/screens/loadout.js b/public/js/screens/loadout.js
index c716f919..07728cab 100644
--- a/public/js/screens/loadout.js
+++ b/public/js/screens/loadout.js
@@ -403,7 +403,7 @@ function LoadoutScreen({ st }) {
   const m = data.get('assets');
   const getChess = (id) => data.lookup('chess', id);
   const getBond = (id) => data.lookup('bonds', id);
-  const roster = useMemo(() => rosterOf(data.list('chess')), [ready]);
+  const roster = useMemo(() => rosterOf(data.list('chess')), [ready, data.locale()]); // (names follow a language switch)
   const bonds = useMemo(() => {
     const used = new Set(roster.flatMap((c) => c.bonds || []));
     return (data.list('bonds') || []).filter((b) => b && used.has(b.bondId))
diff --git a/public/js/screens/ownership.js b/public/js/screens/ownership.js
index 579b4b2d..d1ecc0e8 100644
--- a/public/js/screens/ownership.js
+++ b/public/js/screens/ownership.js
@@ -23,7 +23,7 @@ const ROMAN = ['', 'I', 'II', 'III', 'IV', 'V', 'VI'];
 
 /** The roster of the tab (data.list('chess'), memoised on the data being ready). */
 export function useOwnershipRoster(ready) {
-  return useMemo(() => ownershipRoster(data.list('chess')), [ready]);
+  return useMemo(() => ownershipRoster(data.list('chess')), [ready, data.locale()]);
 }
 
 /** One chess: the operator → its stand-in, and the 持有 switch (the whole card is the switch). */
diff --git a/public/js/ui/gameComponents.js b/public/js/ui/gameComponents.js
index 3ba221fd..b531e986 100644
--- a/public/js/ui/gameComponents.js
+++ b/public/js/ui/gameComponents.js
@@ -24,7 +24,8 @@ export const GAME_FILES = ['config', 'assets', 'chess', 'bonds', 'items', 'bands
  */
 export function useGameData() {
   const ready = useData(...GAME_FILES);
-  return useMemo(() => makeLookups(ready), [ready]);
+  // (config / factions / choices are read once per memo: a language switch reads them again in the new locale)
+  return useMemo(() => makeLookups(ready), [ready, data.locale()]);
 }
 
 /** A 自选 operator's summon record (data/backups.json `tokens`, 0.2.0), or null. */