Northern Ontario. Fully fluent in French and English, written, spoken, and between the lines. French Catholic schooling. French at home and at work. I realize I am the exception.
I agree with other comments on here, like many other skills, if you don’t use it everyday that skill will rust over time.
Here’s poster that shows French language schools across Canada. It is rather dated but it may somewhat answer the question.
Yep. Had a 2012 Sentra with 150k KMs (close to 100k miles) wanted to check transmission fluid - no dipstick! Wtf? Dealer says not serviceable - f you Nissan.