feat: AI translations at release, 7 new languages and regional fallback

src/ui/tests/i18n/i18n.test.ts

@@ -3,9 +3,11 @@ import { describe, expect, it, beforeEach } from "vitest";
 import {
   changeAppLanguage,
   consumeLoginLanguage,
+  LOCALE_FILES,
   normalizeLanguageCode,
   rememberLoginLanguage,
 } from "../../i18n/i18n";
+import { LANGUAGES, TRANSLATED_LANGUAGES } from "../../i18n/languages";
 
 describe("i18n language handling", () => {
   beforeEach(() => {
@@ -20,6 +22,34 @@ describe("i18n language handling", () => {
     expect(normalizeLanguageCode("unknown")).toBe("en");
   });
 
+  it("maps regional variants to the closest shipped language", () => {
+    expect(normalizeLanguageCode("es-MX")).toBe("es-ES");
+    expect(normalizeLanguageCode("es")).toBe("es-ES");
+    expect(normalizeLanguageCode("sv")).toBe("sv-SE");
+    expect(normalizeLanguageCode("pt")).toBe("pt-BR");
+    expect(normalizeLanguageCode("pt-AO")).toBe("pt-BR");
+    expect(normalizeLanguageCode("zh")).toBe("zh-CN");
+    expect(normalizeLanguageCode("zh-HK")).toBe("zh-TW");
+    expect(normalizeLanguageCode("zh-Hant-TW")).toBe("zh-TW");
+    expect(normalizeLanguageCode("nb-NO")).toBe("no");
+    expect(normalizeLanguageCode("de-AT")).toBe("de");
+    expect(normalizeLanguageCode("sk-SK")).toBe("sk");
+  });
+
+  it("ships a translated file for every listed language", () => {
+    const files = new Set(
+      Object.keys(import.meta.glob("../../locales/translated/*.json")).map(
+        (path) => path.split("/").pop()?.replace(".json", ""),
+      ),
+    );
+    for (const language of TRANSLATED_LANGUAGES) {
+      expect(LOCALE_FILES[language.code]).toBe(language.file);
+      expect(files.has(language.file), language.file).toBe(true);
+    }
+    expect(LANGUAGES[0]).toEqual({ code: "en", label: "English" });
+    expect(LANGUAGES).toHaveLength(TRANSLATED_LANGUAGES.length + 1);
+  });
+
   it("stores the normalized language after a successful switch", async () => {
     await expect(changeAppLanguage("zh_CN")).resolves.toBe("zh-CN");
     expect(localStorage.getItem("i18nextLng")).toBe("zh-CN");