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.
According to this song, you pronounce like trying to cough up some phlegm that's gotten stuck in your throat. I can only assume that their history of coal mining has affected the language.