We (French speaking peoples) have several instances, the one I’m writing from is probably the most active on lemmy, the others are on piefed.

I’d say it’s probably because of your language settings or because of those German instance settings.

I had to block several of their communities as I don’t have German selected in my languages but they still show on all (and in German, not English posts hosted on a German instance), so they are just badly setup.