A googler landed on OffQc searching for an answer to what on peut-tu means in Quebec French.
It’s an informal question starter meaning the same thing as est-ce qu’on peut.
On peut-tu faire ça? means est-ce qu’on peut faire ça? (Can we do that?)
On peut-tu changer de sujet? means est-ce qu’on peut changer de sujet? (Can we change the subject?)
Just remember that the form using on peut-tu is informal only. It can be heard in everyday relaxed speech, but you’ll come across it much less in writing (unless it’s particularly informal writing).
The -tu part in on peut-tu has nothing to do with “you” (second person singular tu). It’s an informal yes-no question marker instead.
