From what I got (correct me if I’m wrong) you can only see posts in the languages that are set in your profile but those depend on your instance’s languages. And it seems most instances don’t support multiple languages. Filtering in lemmyverse.net, the only instance that includes smaller languages seems to be feddit.dk but it feels a bit weird to sign up there as I don’t speak Danish. So do you know any other instances that support many languages or may do in the future or is most of lemmy basically English/Spanish?
I suggest mentioning that in your application. The admin isn’t strict, he just want to keep out trolls and bad actors. I can suggest sending this post through DeepL as the admin there discusses e.g. approval of applications. It might help you understand what is needed.
https://feddit.dk/post/226231
We do have one active Swede so Swedish is possible to see on feddit.dk