Księga Czarodzieja (Book of the Sorcerer) - a Polish mod that adds factions.

No, not everyone knows Polish, and if it's written nonsensically, then it's nonsense.

Well, I don't know either, let's figure it out together:
Strajnik - something unclear, probably some kind of monster, I'll call it a strap-on. (Guard)
Duh grozi - completely incomprehensible, I'll call it nonsense. (Spirit of the Storm)
Feia Svetlaya - probably this is the name Faina, I'll call her Faya. (you guess)
Is it really that hard to just read the name?