Yes, but even the long form census did not identify rights holders. The question only refers to whether they spoke French. That is not the same thing.
I want to point out that in Western and Northern Canada, the starting point cannot only be those who speak French. If we want the language to survive, we have to promote it and repair all the damage that has been done, take a broad view of things, use the census and go even further because, in terms of French in Western Canada, the questions were not enough.