If you thought last gen's Cofagrigus controversy was going to cause Nintendo to listen to reason... tough luck. If anything, they've taken nickname censorship to new heights. Many bad words that are only used in specific parts of the world or even a certain country were banned worldwide, even when the nickname itself is perfectly okay. For example, good luck naming a Pokémon after Kakashi from Naruto. As it turns out, "kak" is South African slang for feces. Are you serious? Banning a potentially common three-letter string just because of slang USED ONLY IN SOUTH AFRICA? Forget about "Thanks Obama" too, you can see "SOB" in there. Yep, even if there's a space the censor is triggered. The word "kill" is also out of the question. "Penelope"? Tough luck, "pene" is Spanish for PINGAS. Then again, what else did you expect from the company that shut down Swapnote instead of adding a special notice about online content not being rated like every other company?
So I tried having some fun with French Canadian swear words, and believe it or not, they cracked down on these too. "Tabarnak" is a no-go, and neither are "tabarnacle" and the proper spelling of "tabernacle". "Crisse" doesn't work, as does "criss". So if nicknaming something "criss-cross" is your thing, blame Quebec. "Calisse" doesn't work either, but oddly enough "calvaire" does. And finally, although it has nothing to do with Quebec swear words, Hitler spelled normally doesn't pass, but replacing the L with an uppercase i works. Something to keep in mind when using Wonder Trade.
Finally, there IS one silver lining: "fag" is still forbidden, EXCEPT when the nickname used is Cofagrigus. Progress!