added i18n, english and french for now

src/main.ts

@@ -2,14 +2,27 @@ import { createApp } from 'vue'
 import router from './router.ts'
 import App from './App.vue'
 import { validateToken } from './store.ts'
+import { fluent, setLanguage } from './i18n'
 
 import './base.css'
+import { getLocalePreference } from './authStore.ts'
 
 async function init() {
   await validateToken()
 
   const app = createApp(App)
   app.use(router)
+  app.use(fluent)
+
+  const savedLocale = await getLocalePreference();
+  const osLocale = navigator.language;
+
+  if (savedLocale) {
+    setLanguage(savedLocale);
+  } else {
+    setLanguage(osLocale);
+  }
+
   app.mount('#app')
 }