feat: Languages with country codes

client/src/locales/en-US/index.js

@@ -0,0 +1,11 @@
+import merge from 'lodash/merge';
+
+import login from './login';
+import core from './core';
+
+export default {
+  language: 'en-US',
+  country: 'us',
+  name: 'English',
+  embeddedLocale: merge(login, core),
+};