We actually found the answer to this in zone chat, just sharing in case anyone else can't figure it out and doesn't want to ask.
Go to your Inventory window, then remove it from the Costume slot under Accessories.
Every time someone swears, it gets replaced with three asterisks. There's only one three-letter swear word that I know of. I read that in the place of every set of three asterisks. It makes for some amusing sentences.