Um, as far as "founding nations" goes, neither the Brits nor the French were in North Am. North America was found a long time before either of those two arrogant and egotistical brands of humans popped into the scene. And those peoples that were here long before the Europeans came from Asia and South America. The Norse were even here before the Einglish and French.
Europeans in general developed the nation of Canada into a country. Besides the English and French, there were Dutch, Irish, Scots, Swedes, etc.
IMO, the entire issue of an "offical language" is trivial and regressive. If any such thing existed as an "official" language, it should be that which is used the most. And leave the sentimentality for the history books.
Oh, and French is no more in danger of disappearing in Quebec than it is in New Brunswick, Manitoba, Ontario, Louisiana, West Indies, Saint Pierre and Miquelon, Haiti, Commonwealth of Dominica, etc. or even France, I'd bet.