text: Title: zh_Hans translation file has a problem
  Body: I package django-import-export for Debian, and the Debian checkers found an issue with the zh_Hans translation ([report](https://i18n.debian.org/l10n-pkg-status/p/python-django-import-export.html)):
  ```gettext: import_export/locale/zh_Hans/LC_MESSAGES/django.po: can't guess language```