I put German word lists reduced to 5 letters and English A-Z in a zip file here:
https://github.com/bbbbbr/gb-wordyl/issues/1
If you're interested, you can take a look to see if they are suitable.
If they are, and you are up for it, it would be nice if you might skim through and remove typically offensive words from the shorter "answers" list (this shorter list is where it chooses the secret word for each round).