This Thread is sticky.
In this Thread I'll always update the currently translated languages.
If anyone is willing to translate a language that is not listed here or only partially finished, please reply to this thread.
German (de_DE) - by @User20
Pirate Speak (en_PT) - by @User8
French (fr_FR) - by @User6
Hungarian (hu_HU) - by @User13
Italian (it_IT) - by @User59
Polish (pl_PL) - by @User26
Portuguese (pt_PT and pt_BR) - by @User2587
Swedish (sv_SE) - by @User54
Dutch (nl_NL) - by @User67
Chinese (Traditional) (zh_TW) - by @User10208
Russian (ru_RU) (partially)
Spanish (es_ES) - by @Octavigon (partially)
Finnish (fi_FI) (partially)
Thai (th_TH) (partially)
Turkish (tr_TR) (partially)