How do you say "to stop ...ing" in Korean, Japanese, Spanish?

그만 is in Korean "Stop" I'm sorry I don't know Japanese or Spanish... Anyway if you would be telling someone to stop in a more polite way you would say 그만하세요!(Please Stop!) and for a less polite way you can say 그만해! (Stop it) 이 책을 읽기 그만했다 would be "I stopped reading this book" :]