In Polish when we want to withdraw from saying "kurwa", we say "kurka wodna" (water bird similar to a hen) or "kurza twarz" (the face of a hen), sometimes similar things or switch to nonexisting words like e.g. "kuśwa" or "kuwa".
Polish 'go to hell' is "Idź do diabła" (go to the devil) or oldfashioned "do diaska" (the same meaning but the devil not so serious one - rather a kind of an evil dwarf). Sometimes substituted with even more rude "spadaj" (fall off?) Or "spływaj" (
**** off?) or similar. When you want suggest someone to go away, you may always say "Sprawdź czy Cię nie ma w..." (Look if you're not in...).
When you are completely not interested in something and an annoying person keeps on talking about it to you. Or when you don't mind some rules or regulations - the rude answer is "Mam to w dupie" (I have it in my ass) what you can easily switch to nice though somewhat enigmatic expression "Mam to w GŁĘBOKIM poważaniu" (I have it in the DEEP respect).