I think it would be difficult to legislate this outside Quebec. Bill 101, as legislated in Quebec, is recognized worldwide. The three linguistic groups that have succeeded best in defending their minority language are the populations that speak Hebrew, a nearly dead language that became a state language, followed, on an equal footing, by the people of Catalonia and Quebec.
The concept of a common language is something I find very meaningful. I believe that it's section 59 that authorizes Quebec to disallow mother tongue as a criterion for becoming a rights holder for education. If this criterion had been applied, one can only guess that owing to the attraction of English, there would already be many francophones who would choose to send their children to an English language school because of what I call "social naïveté", meaning that they believe the best bilingualism program is 50-50.
In the United States, the education program based on the principle of dual immersion is the most highly rated in terms of bilingualism.x Spanish speakers spend 50% of their time studying in their own language and 50% in English, and English speakers do the same. It's a very good program, but if we were to try to apply it in a minority setting, it would amount to collective suicide.
Common language is a very useful concept for Quebec, one which allows Quebec to protect itself. In North America as a whole, the overall percentage of francophones is very low. Quebec therefore needs to become a bastion, and to defend itself.