"Damn", "ass", and "piss" are common. Rare uses of "bastard" and "shit".
Kai swears at Yul in one episode. The profanity is bleeped out but it's implied he said the B-word and the F-word multiple times. Later in the episode, a middle finger is given (blurred)
James says "F**k my followers" uncensored.
Grett flips the bird, but it is censored (as usual).
Curses non censored.
Yul points out the fact that Fiore is a child so she reply's with "and that's an ugly pimply bitch"