Absolutely agreed. To practice in the US, go to a US school, the best one you can get into. If language is a bar, stay in Canada and go to school there where you can practice in French, perhhaps with a Canadian branch of a US firm, or with a Canadian firm. You will have a very tough or impossible time getting into a US firm with a Canadian degree, even if you pass the Bar, and it will be much harder to pass the Bar in any state having gone to a foreign school. Law is a local profession, not transferable.
Lousiana law differs from law in the other states because it is based on the Napoleonic Code, but it is of course in English, not French, and since its is subject to the US Constitution, much of the difference is in terminology, not in substance.