your friends

I don’t have friends. I’m a Lemming (former Redditor), after all.

elsewhere on the Fediverse

Good point.

There’s !czech@kbin.social but federation with Lemmy does not really work at this point.
There are several Mastodon instances like witter.cz which are reasonably alive but I prefer Reddit-style social media. I might need to compromise on this, though.
Hive and Dread have been suggested but I can’t imagine the crypro-heavy or dark web platforms attracting a meaningful crowd.