Earlier quoted context omitted.
Whatever it is they are speaking, French it ain't. It's a _superthick_ accent. I have the same with many a Brit btw, they can produce some of the most ununderstandable English I've ever heard.
The Québecois, and French Canadians as a whole, speak perfect French. Of course they have an accent, but so do Texans and the Scottish, yet it's still English.
https://www.theglobeandmail.com/news/national/deplorable-que...
It's similar to how American English preserves what modern British English has since lost.
https://www.languagehumanities.org/what-is-the-difference-be...
https://www.bbc.com/culture/article/20180207-how-americans-p...