How to translate snap-interface into existing language?

Hi, i translated Snap to Norwegian 7 years ago, lots of blocks emerged and now it needs a makeover and completing effort.
Where do I find the language file ?
Is there a description of how to .... translate menu- and blocktexts ?
Olav :slight_smile:

Here's your Norwegian translation:
and here's the current, complete German translation for reference:

Thanks for doing this!