Any idea if we can use filters for posts in a specific language?

Yea you can it’s in the settings on the web version

Hi there! Your text contains links to other Lemmy communities, here are correct links for Lemmy users: [email protected]

Just uncheck the ones you don’t want to see on your settings. Should be available on the website version.

EDIT: Settings->3 line menu->Other (By default it starts on Appearance I think)