feat: add French and Spanish locales and update language selector

client/src/components/LanguageDropdown.tsx

@@ -63,6 +63,21 @@ function FlagIcon({ lang, className, style }: { lang: string; className?: string
           <path d="M7,0 h2 v16 h-2 z M0,7 h22 v2 h-22 z" fill="#00205B"/>
         </svg>
       )
+    case 'fr':
+      return (
+        <svg viewBox="0 0 3 2" className={className} style={baseStyle}>
+          <rect width="3" height="2" fill="#FFFFFF"/>
+          <rect width="1" height="2" fill="#002395"/>
+          <rect x="2" width="1" height="2" fill="#ED2939"/>
+        </svg>
+      )
+    case 'es':
+      return (
+        <svg viewBox="0 0 3 2" className={className} style={baseStyle}>
+          <rect width="3" height="2" fill="#C1272D"/>
+          <rect y="0.5" width="3" height="1" fill="#FEE100"/>
+        </svg>
+      )
     default:
       return null
   }

client/src/i18n/index.ts

@@ -6,6 +6,8 @@ import deJson from './locales/de.json'
 import daJson from './locales/da.json'
 import svJson from './locales/sv.json'
 import nbJson from './locales/nb.json'
+import frJson from './locales/fr.json'
+import esJson from './locales/es.json'
 import { initSeo } from '../utils/seo.js'
 import { SUPPORTED_LANGUAGES } from '../utils/i18nLanguages.js'
 
@@ -15,7 +17,9 @@ const resources = {
   de: { translation: deJson.translation },
   da: { translation: daJson.translation },
   sv: { translation: svJson.translation },
-  nb: { translation: nbJson.translation }
+  nb: { translation: nbJson.translation },
+  fr: { translation: frJson.translation },
+  es: { translation: esJson.translation }
 }
 
 i18n

client/src/i18n/localeKeys.test.ts

@@ -4,6 +4,8 @@ import enJson from '../i18n/locales/en.json'
 import daJson from '../i18n/locales/da.json'
 import svJson from '../i18n/locales/sv.json'
 import nbJson from '../i18n/locales/nb.json'
+import frJson from '../i18n/locales/fr.json'
+import esJson from '../i18n/locales/es.json'
 
 function collectKeys(obj: Record<string, unknown>, prefix = ''): string[] {
   const keys: string[] = []
@@ -23,7 +25,9 @@ const bundles = {
   en: enJson.translation,
   da: daJson.translation,
   sv: svJson.translation,
-  nb: nbJson.translation
+  nb: nbJson.translation,
+  fr: frJson.translation,
+  es: esJson.translation
 } as const
 
 describe('i18n locale key parity', () => {

client/src/i18n/locales/de.json

@@ -15,7 +15,9 @@
       "en": "English",
       "da": "Dansk",
       "sv": "Svenska",
-      "nb": "Norsk"
+      "nb": "Norsk",
+      "fr": "Français",
+      "es": "Español"
     },
     "dialog": {
       "ok": "OK",

client/src/i18n/locales/en.json

@@ -15,7 +15,9 @@
       "en": "English",
       "da": "Dansk",
       "sv": "Svenska",
-      "nb": "Norsk"
+      "nb": "Norsk",
+      "fr": "French",
+      "es": "Spanish"
     },
     "dialog": {
       "ok": "OK",

client/src/utils/i18nLanguages.test.ts

@@ -20,14 +20,13 @@ vi.mock('../services/analytics.js', async (importOriginal) => {
 })
 
 function createMockI18n(language: string): I18nInstance {
-  let current = language
-  return {
-    language: current,
+  const mock = {
+    language,
     changeLanguage: vi.fn(async (lng: string) => {
-      current = lng
-      ;(this as { language: string }).language = lng
+      mock.language = lng
     })
   } as unknown as I18nInstance
+  return mock
 }
 
 describe('i18nLanguages', () => {
@@ -72,11 +71,11 @@ describe('i18nLanguages', () => {
   })
 
   it('cycleAppLanguage tracks the next language', () => {
-    const i18n = createMockI18n('nb')
+    const i18n = createMockI18n('es')
     cycleAppLanguage(i18n)
 
     expect(trackPlausibleEvent).toHaveBeenCalledWith(PlausibleEvents.LANGUAGE_CHANGED, {
-      from: 'nb',
+      from: 'es',
       to: 'de'
     })
   })

client/src/utils/i18nLanguages.ts

@@ -2,7 +2,7 @@ import type { i18n as I18nInstance } from 'i18next'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 
 /** Supported UI languages (ISO 639-1, language-only). */
-export const SUPPORTED_LANGUAGES = ['de', 'en', 'da', 'sv', 'nb'] as const
+export const SUPPORTED_LANGUAGES = ['de', 'en', 'da', 'sv', 'nb', 'fr', 'es'] as const
 
 export type AppLanguage = (typeof SUPPORTED_LANGUAGES)[number]
 
@@ -11,7 +11,9 @@ export const LANGUAGE_FLAGS: Record<AppLanguage, string> = {
   en: '🇬🇧',
   da: '🇩🇰',
   sv: '🇸🇪',
-  nb: '🇳🇴'
+  nb: '🇳🇴',
+  fr: '🇫🇷',
+  es: '🇪🇸'
 }
 
 export function normalizeAppLanguage(language?: string): AppLanguage {

client/src/utils/seo.ts

@@ -10,7 +10,9 @@ const OG_LOCALES: Record<SeoLang, string> = {
   en: 'en_GB',
   da: 'da_DK',
   sv: 'sv_SE',
-  nb: 'nb_NO'
+  nb: 'nb_NO',
+  fr: 'fr_FR',
+  es: 'es_ES'
 }
 
 let i18nRef: I18nInstance | null = null

scripts/translate-locales.mjs

@@ -23,7 +23,9 @@ const defaultSource = resolve(repoRoot, 'client/src/i18n/locales/de.json')
 const TARGETS = {
   da: 'DA',
   sv: 'SV',
-  nb: 'NB'
+  nb: 'NB',
+  fr: 'FR',
+  es: 'ES'
 }
 
 /** Keys whose values stay identical to source (language names, brand). */

scripts/validate-i18n-keys.mjs

@@ -11,7 +11,7 @@ import { flattenTranslation } from './lib/deepl-translate.mjs'
 
 const __dirname = dirname(fileURLToPath(import.meta.url))
 const localesDir = resolve(__dirname, '../client/src/i18n/locales')
-const localeFiles = ['de.json', 'en.json', 'da.json', 'sv.json', 'nb.json']
+const localeFiles = ['de.json', 'en.json', 'da.json', 'sv.json', 'nb.json', 'fr.json', 'es.json']
 
 async function loadKeys(filename) {
   const raw = await readFile(resolve(localesDir, filename), 'utf8')