PLT-2358: Detect user localization using client headers

webapp/action_creators/global_actions.jsx

@@ -264,6 +264,14 @@ export function newLocalizationSelected(locale) {
     }
 }
 
+export function loadBrowserLocale() {
+    let locale = (navigator.languages ? navigator.languages[0] : (navigator.language || navigator.userLanguage)).split('-')[0];
+    if (!I18n.getLanguages()[locale]) {
+        locale = 'en';
+    }
+    return newLocalizationSelected(locale);
+}
+
 export function viewLoggedIn() {
     AsyncClient.getChannels();
     AsyncClient.getChannelExtraInfo();

webapp/components/root.jsx

@@ -69,7 +69,7 @@ export default class Root extends React.Component {
         FastClick.attach(document.body);
 
         // Get our localizaiton
-        GlobalActions.newLocalizationSelected('en');
+        GlobalActions.loadBrowserLocale();
     }
     componentWillUnmount() {
         LocalizationStore.removeChangeListener(this.localizationChanged);