To open your mouth in England is (if I may use black English) to "put your business in the street": You have confessed your parents, your youth, your school, your salary, your self-esteem, and, alas, your future.
I didn’t know the way you talked told so much about you.
A Frenchman living in Paris speaks a subtly and crucially different language from that of the man living in Marseilles; neither sounds very much like a man living in Quebec; and they would all have great difficulty in apprehending what the man from Guadeloupe, or Martinique, is saying, to say nothing of the man from Senegal--although the "common" language of all these areas is French.
It’s pretty amazing that these areas all speak French but they all speak different types of French. This just shows that it’s not just English that you could speak a different kind of English in every language you can speak differently.