OK, not written English but my pet hate is pronunciation of certain words. Blue Peter drove me insane as a child with, "Take out your crayrons and do some drawring." The ruddy words are crayon and drawing ffs! That old advert years ago where the pregnant bird wanted a tuna and banana pizza as well, because the twunt voiceover pronounced it tuner and bernanrer.
Oooooh! I need a lie down now, and a rub down with a wet flannel.