I'm kind of sad to see this proposed, if only because it highlights a lack of understanding of recent history that is, bluntly put, staggering. The idea of a dual state has already been suggested, debated, proposed and voted down. The entire point of the Meech Lake and Charlottetown accords was precisely the same idea being pitched here, just with slightly different labels. The reason it isn't going to fly is because the idea of "Two founding nations" has only really had currency in Quebec and Ontario. There isn't such a thing, constitutionally speaking, of "English Canada" and "French Canada". It is 10 equal provinces and the last time we went through this, the provinces, especially the west, made it abundantly clear that they weren't going to be turned into third class citizens, with Quebec and Ontario being the first and second class respectively.
The entire idea of organizing the country along French/English lines requires some serious wilful blindness in any case. Trying to lump British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Nova Scotia, PEI, New Brunswick and Newfoundland & Labrador into some mass called English Canada simply ignores the political, constitutional, linguistic and cultural realities. The end result that Ontario and Quebec need to grasp about confederation is that the only non-negotiable constitutional position that the western and Atlantic provinces have is that there will be no special powers or distinct society or anything of the sort. In short, the provinces are willing to grant Quebec whatever they want, as long as they get the exact same powers, full stop.