On the default motd it says something about us reading our rules, how to players do that - is there a command or smth?

That's... a great question lol. No, there is no /rules atm. I'll add that w/in the week. Seems useful.

(I'd sort of just assumed people would have signs or something, but you raise a good point. Is strange that I mention rules, but don't provide a way to view them haha)

TODO @me: if you do this, make sure chars from other languages do not get mangled like with EssentialCommands.properties

Thanks 👍

Added in 99f2198. Will be in the next release (0.30.0).