QGC translation help needed

FYI: We are starting to work on translations for QGC. See if you can or know anyone that can help: https://crowdin.com/project/qgroundcontrol

I see the translation files in “translations” folder of QgroundControl v3.4.4. However, language change when I change my localization on the computer.

Is this function (translation) available now, or may be I am doing something wrong?