Chrome (i.e. Google Translate) and its variants work just fine for 99% translating of the forum - I use it very frequently. The 1% that doesn't work is comments in code tags and similar and, of course images. Chrome translation token can get corrupted and then automatic translation doesn't want to work, you can try getting an alternative version of chromium eg nightly builds... There are other alternatives you can also consider, e.g. Yandex translate which does entire pages.

Lastly, I'd suggest you head to daemon's Discord which is the most active public modding server around ... link in his profile.