There's now a blurb about the Liberi on the wiki (and therefore viewable in-game as well via HELP LIBERI). It's a copypasta with slight adjustments of the BBS post announcing them a while back.
https://cogg.contrarium.net/wiki/index.php/Liberi
Liberi blurb
Liberi blurb
<Rias> PUT ON PANTS
<Fellborn> NO
<Fellborn> NO