I wrote a book on language policy back in the 1990s. That's it there. One of the measures that I used to try to determine the vitality of the language within a language community was to look at the ratio between mother tongue and language spoken most often in the home. The lower the proportion of people who are using it in the home, the weaker the situation for the language. I looked at the numbers you've provided on some of the larger language groups. I see that number contradicting another number you've provided. In the case of the Innu language, I see there are 10,710 individuals who have this as their mother tongue, and about 90%, so 9,500 individuals, use it primarily in the home. I looked at Ojibway and I see that of the 20,470 who have it as their mother tongue, only 9,005, or 43%, use it in the home. That implies a very significant rate of decline in a single generation. Yet when we look at the ability to conduct a conversation, we see something very different. We see that for Innu, only 9% of total speakers are those for whom it's not a mother tongue, and that figure for Ojibway is 20%.
I'm just wondering what the dynamic is there. That's something I've never experienced in looking at official language communities, which is the source of what I was looking at in my book.