Man, if George Carlin had been around to see this…
Nintendo has had a profanity filter in place for their gaming systems for quite a long while now, even going so far as to end support and close the Swapnote app on the 3DS. Of course, because the internet, Redditor dolopodog has gone ahead and datamined the 3DS and found a full list of banned words in many, MANY languages, later posed on PasteBin by Redditor therevolution18. You can find all of these words here, but remember: You’ve been warned… Jeez, Nintendo thought of everything!