Why would the comment imply inferiority? Don't Canadians speak French with a different accent and dialect than Parisians? Don't Parisians speak with a different accent and dialect than people in other parts of France? Don't people in Nigeria speak French differently as well?

I'm in Tennessee. I speak English differently than someone from Minnesota or New Jersey, or even someone in another Southern state. It's not better or worse, it's just different.

Seems to me, though, that if he were addressing a Canadian audience, he'd want to sound like one of them.