Right now, Lemmy only lets you pick one language to see and forces you to manually choose a language every time you post. Because of that, most posts end up marked as “undetermined,” so filtering by language hides most content.
It would make more sense if:
You could set multiple preferred languages to view posts and comments.
You could set a default posting language instead of picking it every time.
The initial language settings were auto-filled based on browser or system language.
This would make the language functionality much more useful.