This has been alluded to upthread by DoDo, but I thought that I would just refer to what has become known as the "Cree Question" in Canada.

This question concerns the rights of those to secede from those seceding. In the case of the Cree who live in parts of northern Quebec, their position has been that as the Quebecois are allowed a right of self-determination, so to are the Cree.

So might we see, oh say, Cornwall seceding from England? I mean, it does have it's own language, yes?