Basically, that's it.
I'm a French speaker, so I try to participate mainly on the French speaking communities such as !forumlibre@jlai.lu, !rance@jlai.lu, !cineseries@jlai.lu, but the issue is that apart from the 2-3 top ones, the others are usually very quiet.
I know it's a chicken and egg problem (as you need content for people to come and participate), but for instance with movies, I'm always torn between posting the content in the French-speaking community, or the much larger !movies@lemm.ee, where I know that the audience is much bigger. Same for science, history, most topics actually.
I don't expect anyone to have a magical formula (the most obvious solution being just having more speakers of that language on Lemmy), but I was curious to see if other people in the same situation had insights to share.
A lot of yellow cards against the French, some of them not seeming deserved