locale-source: translations added

[m4ra]

Tasks

• [ ] PR name contains story or task reference
• [ ] Documentation (docs and inline)
• [ ] Tests (including n+1 and django_assert_num_queries where applicable)
• [ ] Changelog

[m4ra]

@TeaJayyy I have pushed translations to transifex, please have a look.

[TeaJayyy]

@m4ra @goapunk done