If you want to use some swear words, you are allowed. You can use your classic bad words like the usual f word, s word and a word, but don't get your hopes up if you want to use insult words. Swear words used only for insults are not allowed. I'm talking about the words bitch, faggot and nigger. Thank you for your attention. -Bilou.
You are not restrained from swearing, but overuse of swear words might be punished. Of course, it will depend on the case, but still, try not to swear too much.