[Ben L.]

That would be translating bbPress, and you’d need two things: Poedit and The bbPress POT file from your version.

You’d want to make “new from POT”, then save it as de.

Find the things you want to translate and put the translations in for them, then save again, and upload the de.mo to your forum’s my-languages folder. If it doesn’t already have one, make one.

Then, in your bb-config.php, set BB_LANG to de, and you’re done!