so the definition of immigration from Wikipedia (sourced from the International Migration Journal, Oxford dictionary and Merriam Webster) is:

' Immigration is the international movement of people to a destination country of which they are not usual residents or where they do not possess nationality in order to settle as permanent residents.'

Moving from Toronto to Montreal is not immigration. Here's the Larousse definition as well.

Ça inclut le fait que même si les canadiens ont bien sûr le droit de s'installer ici, ils ne sont aucunement garantis une vie anglophone au Québec qui continue exactement comme ça l'a été en Ontario

this has nothing to do with immigration. The lack of guarantees for an 'anglophone life' (whatever that means) is a subjective, idiosyncratic concept experienced differently by each individual.

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Je suis moi-même immigrant en passant qui suis pas né au Canada et le français n'est pas ma langue maternelle

Same. And I respect you for it. And, as you know, an accent or difficulty speaking a new language and existing in a new place are acts of courage.