Reflang might not work with locales longer than 2 symbols.

[egor83]

Reflang works with 2-letter locales ('en', 'de', ...), but fails with longer ('zh_Hans', for instance).
I'll test some more, but I'm quite sure the problem lies here, line 214:
https://github.com/mbi/django-rosetta/pull/60/files#diff-b1b9cc9184baf1c5f4af99b915eb35e3R214
If locale being handled has name longer than 2 letters, it fails and falls back on msgid.
In our experience, switching from 'zh_Hans' to 'zh' helped.

---

• Which version of Django are you using?:
  1.8.13

• Which version of django-rosetta are you using?:
  0.7.12

• Have you looked trough recent issues and checked this isn't a duplicate?
  Yes - searching for "locale" brings up a few solved issues, but these are about Rosetta in general, and not reflang.

[egor83]

Reference language - added for discoverability.