Don't worry so much about French. Apart from a few words that have nothing to do with aviation, everything is completely the same. There are starting to be differences and misunderstandings between the French and Canadians, but we don't have any Quebecers in our company.
Moreover, even regarding the accent, we all have more or less the same one. Only the working classes can have a relatively strong accent.
Indeed, saying to put it in is completely unclear, and that makes it a credible and justified cause of the crash. But we are absolutely not talking about that. We are almost 50 years after that crash, and while it is obvious that it lacked callouts, we would never do that again. On the contrary, we may have fallen into the opposite excess.
I am just advocating for a balanced approach.