New Orleans and the surrounding area is full of so many cultures that can change faster than the terrain. Settled by Native, French, Senegal, German, Acadian, Spanish, Islenos, 'mericans, Haitian, Irish, Italian, Philippine, Croatian, and that is just until 1900.
Needless to say, pronunciations can be a hot mess.
Just accents can be problematic too. My GF was going to college in Hammond on the North Shore and I was going to transfer to a College on Bayou Lafourche. One is in "redneck" country and the other is Cajun. We both tended to pick up accents so I wondered if we would be able to understand each other on the weekend.