i18n(fr): ship French in the language picker

- Register fr: catalog in CATALOGS, LOCALES and LOCALE_NAMES (Français);
  any fr-* browser tag (fr-CA, fr-BE, fr-CH) maps to it.
- package-boundaries.json lists fr.json next to the other catalogs.
- Picker and locale tests cover the new row and its local names.
- docs/translations/fr.md: style, typography, plurals and glossary;
  TRANSLATORS.md and CURRENT-STATE.md list French as shipped.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/i18n/i18n.test.mjs

@@ -34,6 +34,9 @@ test('normalizeLocale folds regional variants and rejects unshipped tags', () =>
   assert.equal(normalizeLocale('ru-RU'), 'ru');
   assert.equal(normalizeLocale(' RU '), 'ru');
   assert.equal(normalizeLocale('en_GB'), 'en');
+  assert.equal(normalizeLocale('fr'), 'fr');
+  assert.equal(normalizeLocale('fr-CA'), 'fr');
+  assert.equal(normalizeLocale('FR_be'), 'fr');
   assert.equal(normalizeLocale('xx'), null);
   // Explicit script tags take precedence over regional defaults.
   assert.equal(normalizeLocale('zh'), 'zh-CN');

src/i18n/index.js

@@ -17,11 +17,18 @@ import {
   writeStoredLocale,
 } from './locale.js';
 import es from './locales/es.json' with { type: 'json' };
+import fr from './locales/fr.json' with { type: 'json' };
 import ru from './locales/ru.json' with { type: 'json' };
 import zhCN from './locales/zh-CN.json' with { type: 'json' };
 import zhHant from './locales/zh-Hant.json' with { type: 'json' };
 
-const CATALOGS = Object.freeze({ es, ru, 'zh-CN': zhCN, 'zh-Hant': zhHant });
+const CATALOGS = Object.freeze({
+  es,
+  fr,
+  ru,
+  'zh-CN': zhCN,
+  'zh-Hant': zhHant,
+});
 
 let currentLocale = DEFAULT_LOCALE;
 

src/i18n/locale.js

@@ -8,12 +8,20 @@ export const LOCALE_STORAGE_KEY = 'gev:locale:v1';
 export const DEFAULT_LOCALE = 'en';
 
 /** Shipped locales; order does not matter. Adding one: docs/TRANSLATORS.md. */
-export const LOCALES = Object.freeze(['en', 'es', 'ru', 'zh-CN', 'zh-Hant']);
+export const LOCALES = Object.freeze([
+  'en',
+  'es',
+  'fr',
+  'ru',
+  'zh-CN',
+  'zh-Hant',
+]);
 
 /** Each locale named in its own language, for the selector. */
 export const LOCALE_NAMES = Object.freeze({
   en: 'English',
   es: 'Español',
+  fr: 'Français',
   ru: 'Русский',
   'zh-CN': '中文（简体）',
   'zh-Hant': '中文（繁體）',

src/ui/localePicker.test.mjs

@@ -40,7 +40,7 @@ test('the current language comes first, the rest by their own names', () => {
         nativeNames: LOCALE_NAMES,
       }),
     ),
-    ['ru', 'en', 'es', 'zh-CN', 'zh-Hant'],
+    ['ru', 'en', 'es', 'fr', 'zh-CN', 'zh-Hant'],
   );
   assert.deepEqual(
     codes(
@@ -50,7 +50,7 @@ test('the current language comes first, the rest by their own names', () => {
         nativeNames: LOCALE_NAMES,
       }),
     ),
-    ['es', 'en', 'ru', 'zh-CN', 'zh-Hant'],
+    ['es', 'en', 'fr', 'ru', 'zh-CN', 'zh-Hant'],
   );
   assert.deepEqual(
     codes(
@@ -60,7 +60,7 @@ test('the current language comes first, the rest by their own names', () => {
         nativeNames: LOCALE_NAMES,
       }),
     ),
-    ['en', 'es', 'ru', 'zh-CN', 'zh-Hant'],
+    ['en', 'es', 'fr', 'ru', 'zh-CN', 'zh-Hant'],
   );
   const rows = buildLocaleOptions({
     locales: MANY,
@@ -95,6 +95,7 @@ test('each row gets the interface-language name for search, unless it only repea
   const byCode = Object.fromEntries(rows.map((row) => [row.code, row]));
   assert.equal(byCode.en.localName, 'английский');
   assert.equal(byCode.es.localName, 'испанский');
+  assert.equal(byCode.fr.localName, 'французский');
   assert.equal(byCode.ru.localName, '', 'русский only repeats Русский');
   const english = buildLocaleOptions({
     locales: LOCALES,
@@ -103,6 +104,7 @@ test('each row gets the interface-language name for search, unless it only repea
     localName: createLocalNameReader('en'),
   });
   assert.equal(english.find((row) => row.code === 'es').localName, 'Spanish');
+  assert.equal(english.find((row) => row.code === 'fr').localName, 'French');
 });
 
 test('without Intl.DisplayNames the interface-language name is simply left out', () => {