Years ago, when local TV ratings wars were the thing, one of the Detroit stations brought in a new crew, mostly hired from out East. The station with the people with most local depth started running commercials against them that highlighted an anchorperson representing one of the foreign imports mispronouncing Gra.tee.ot. It was a very well done takedown.
In the Detroit area there are two road names that betray the foreigner - Gratiot, and for West siders 'Lahser' which the unfamiliar (including too many Detroiters actually) invariably dyslexicly read and pronounce as 'Lasher'