django/django — pull request #1868 by Bouke (2013-11-04 17:36:14+00:00)
Title: Fixed #18149 -- Changed language codes for Chinese

See [ticket 18419](https://code.djangoproject.com/ticket/18419) for rationale.

Language codes for Chinese are zh_Hans (Simplified) and zh_Hant (Traditional). Added support for browsers that still send the deprecated language codes.

Thanks to Olli Wang for the report.