Fix an issue with user language setting.

ui/src/components/navbar.tsx

@@ -31,7 +31,7 @@ import {
   md,
   setTheme,
 } from '../utils';
-import { i18n, i18nextSetup } from '../i18next';
+import { i18n } from '../i18next';
 
 interface NavbarState {
   isLoggedIn: boolean;
@@ -435,12 +435,11 @@ export class Navbar extends Component<any, NavbarState> {
           this.requestNotificationPermission();
           this.fetchUnreads();
           setTheme(data.my_user.theme, true);
+          i18n.changeLanguage(data.my_user.lang);
         }
         this.state.isLoggedIn = true;
       }
 
-      i18nextSetup();
-
       this.state.siteLoading = false;
       this.setState(this.state);
     }

ui/src/i18next.ts

@@ -65,8 +65,7 @@ function format(value: any, format: any, lng: any): any {
   return format === 'uppercase' ? value.toUpperCase() : value;
 }
 
-export function i18nextSetup() {
-  i18next.init({
+i18next.init({
   debug: false,
   // load: 'languageOnly',
 
@@ -75,6 +74,6 @@ export function i18nextSetup() {
   fallbackLng: 'en',
   resources,
   interpolation: { format },
-  });
-}
+});
+
 export { i18next as i18n, resources };