Earlier quoted context omitted.
Sorry to go off on a tangent, but where in France did you experience this? I'm a non-native speaker of French and I have never experienced this, not even when I was in my teens still learning French.
Paris is famous for it, though I've been to several parts of France and didn't have much issue... old people definitely tried to correct my accent but that's fine by me.
I'm not exactly sure what is the issue?
My step-sister is Irish, I talk to her in English and she talk to me in French: this way we can practise our knowledge of foreign language.
At work sometimes I did the reverse: a colleague would speak English and I would answer French, it's nice also: no cognitive load when you talk, you just have to be a little careful when you listen.