[Feature request] Localisation for the app

[furdiburd]

It would be great if the app supported more languages, such as German, French and Hungarian.

[DecentM]

I've had great experiences using https://projectfluent.org/ with a self hosted instance of https://github.com/mozilla/pontoon, if the i18n stack is not nailed down yet

[vorach]

I can translate in French

[wxnnvs]

Could be especially nice when releasing the full walt app internationally. I could translate dutch and french