Transifex allows users to translate strings on the platform, and there is a dedicated project just for translating the platform itself. However, I don't seem to have access to any functionality to change my interface language on Transifex, any idea on how to change it to a language other than English?
You should be able to find a dropdown menu on the bottom left of each page where you can change the interface language. It's to the right of the copyright message.
Hope that helps!