Lack of knowledge isn't dumb, it's just lack of knowledge. You can't know everything.

I run 2 docker containers, named slightly differently (my setup is a bit more complicated within a stack though). Then I map a different port for the FR one so it doesn't conflict. Of course, you need a different config volume. Then once the container is up, you can I link my FR sonarr to my EN one. So when I request something on my EN Sonarr, it also adds it to my FR Sonarr.

I also do that with movies, but for HD and 4K instead. I manage multi-language differently.

I'll PM you for my source of French content.