Yes, and some Cajuns as well. My aunt in Port Arthur was married to a Cajun from Louisiana, and his side of the family spoke Cajun French (I am sure some French people would have a hard time understanding them since much of it is very different) and would often mix a sentence with broken English and French. It was pretty hard to decipher much of the time, and though my cousins could understand them, I never could. Even my aunt had a hard time with it. My uncle had pretty good English because he was a riverboat captain and had to communicate with people who weren't Cajun, LOL.
Yes, Cajun French is quite different from French in France. It is like Yiddish for Orthodox Jews in NYC... it is their own thing.
CD