I built a ROM with the German answer list and dictionary then added it to that ticket (you're also welcome to comment there if you'd like). I did some brief testing and it seems to work as expected.
If you want to give it a try that would be great.
https://github.com/bbbbbr/gb-wordyl/issues/1
If it looks good, maybe I'll add an intro popup message indicating the language and explaining the limitations.