Why not.. you just need to chose a course in english language, most of Polish universities have at least one. Poorer/smaller/worse schools have worse english quality courses ; ) I know many polish students who used the Socrates/Erazmus students exchange programme and they were really happy..
on the other hand my mates who participated in students exchange said that they prefered it outside of Poland - properly and expensively equipped laboratories, and friendlier deans office and professors.. ; )
