What requirement? You suppose to have proof of language: English or French for citizenship. Yeah, you always can move to another province after PR and pass English, but honestly, if you wait 2 years for PR in Quebec it’s ridiculous to move to another province after that.With PR it should be easier to find opportunities outside quebec so many would move out if such requirement is forced upon for citizenship. As it is federal government is responsible for approving Citizenship. If that changes then quebec can be officially called different country and will be exciting to see how it affects canadian $ and the new quebec $ based on thier respective GDPs.
Of course it depends on personal situation, but a lot of ppl are tightened up to province with personal circumstances after many years of leaving in.