> that's not how they write in poland now, how come? eh because poland has always used latin script since poland got christianized in the latin rite in 966? and poland lost it's eastern most territories (ukraine) that tended to use cyrillic alphabet between 1676 and 1772. lithuania used ruthenian (because 2/3rds of gdl's population were ruthenians/belarusians), later polish. after partitions russia forced congress poland to use russian cyrillic in public spaces, especially after the january uprising of 1863, but dual russian-polish street signs were removed post poland regained independence (1918).  
DEUS VULT