Provide locale support for languages we've seen translations for
Summary:
Ref T5267. This isn't exhaustive but should improve support.
As far as I can tell, none of these languages (except emoji) have complicated plural/gender rules (none of the translators have implemented them, third-party sources seem to confirm this).
Test Plan: {F1661586}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T5267
Differential Revision: https://secure.phabricator.com/D15979