I hope everyone knows that if Twisted Wonderland wasn't made by Disney, AT LEAST half of the cast would swear in every sentence.
Ace would have the dirtiest mouth and Riddle would make him get collared all the time for that. Deuce has slip-up curses, like hitting his foot and going "fuCKING SHIT!". Cater has a secret magicam account where Riddle isn't there and he curses about people he has beef online. Probs one of them is Idia. Trey and Riddle are the clean mouth ones, but Trey tries convincing Riddle that "it is okay to drop an F bomb if ya can't hold it". Trey wants to say fuck.
Leona swears and if someone gets bothered by it he will talk about how "they aren't kids anymore to be afraid of saying fuck". Ruggie does it when he is mad but he makes it his life goal to make Jack say 1 singular fuck.
Azul is calm and collected until he is absolutely alone where he will scream in his pillow all curses and swears he knows and can say. This is a daily thing. Jade swears when he wants to make people uneasy, but he doesn't like it as much. Of every 5 words that leave Floyd's mouth, 7 of them are swear words. He creates the most elaborate ones too, all his brain power goes into swearing every generation of someone's family when he is truly mad.
Kalim is prohibited from swearing not because he is a pure bean but because if he starts a swearing spree he DOESN'T STOP. It is to control what others will hear more than Kalim himself. Jamil does the nonswear cursing or Christian cursing like "I hope your pillow has both sides warm this night". he will pray for others' downfall.
Vil doesn't allow himself to swear, he is better than that. Rook doesn't swear to not be a bad example to other pomefiores. Epel had the tape-on-mouth treatment to cure his sailor's mouth. Half of the time he swears under his breath just to make sure no one listens to him, but if he is mad he will go all out.
Idia has the gamer swearing and probably has broken a lot of laws by his swearing online. Cyberbullies noobs on Roblox sorta guy. Ortho has not been programmed with a library of swear words but if he walks with Adeuce any longer he will learn how to do Christian swearing.
Malleus does the old man swearing, and so does Lilia, but to mock people. Lilia knows how to actually curse, but he has self-control. Silver is technically allowed to swear but doesn't want to be a bad influence. Sebek is not allowed to swear because he is already too loud as it is, imagine if swearing
this turned into a big ramble but yeah TWST should be allowed to say fuck IMO <3