Oh yes, Lemmy opposing the far-right, so evil and awful.

Do you have any evidence to suggest that whatsoever?

https://forum.language-learners.org/

Language Learner’s Forum is still quite active and pretty large community.

https://latindiscussion.org/ Latin Discussion is still pretty active

If you like Sid Meier’s Civilization then CivFantatics is really quite active very much.

There are the Woodwind.org forums of course but they aren’t as active as the others. I think that Saxophone.org is somewhat active but less so than it used to be.