To support contributors who are intending to help with translating the QCAD user interface, I've set up a translation server at:translate.qcad.org
Once registered, as a translator, you can start translating individual texts of the QCAD user interface. Any contribution is most valued!
Please let me know if you would like to see other languages added to the list.
The English and the German translations are usually updated by me for every new release.
I'm also maintaining the French, Italian, Spanish and Portuguese translations mainly based on machine translations but I'm happy for corrections and suggestions from native speakers.