Forum tree model, i18n, and frontend updates

frontend/src/i18n.js

@@ -0,0 +1,25 @@
+import i18n from 'i18next'
+import HttpBackend from 'i18next-http-backend'
+import { initReactI18next } from 'react-i18next'
+
+const storedLanguage = localStorage.getItem('speedbb_lang') || 'en'
+
+i18n
+  .use(HttpBackend)
+  .use(initReactI18next)
+  .init({
+    lng: storedLanguage,
+    fallbackLng: 'en',
+    supportedLngs: ['en', 'de'],
+    backend: {
+      loadPath: '/api/i18n/{{lng}}',
+    },
+    react: {
+      useSuspense: false,
+    },
+    interpolation: {
+      escapeValue: false,
+    },
+  })
+
+export default i18n