There's probably a word I've been pronouncing wrong my whole life that I don't know about
Just based on how often I notice someone mispronounce a word without realizing it (or have done so myself and realized it later). Statistically I'm probably still doing it with some word.
Thanks for reminding me of these. A while back I met someone named Chateauneuf, and I tried to look up how to pronounce his name and found this very helpful answer.