Basically, I will say the same thing as Mr. Genuis.
I always speak in French at committee meetings. In my opinion, this motion would make me somewhat less nimble. It would not let me make motions or amendments in reaction to a given situation. It's not a language issue at all; it's really a question of being nimble as we do the work of the opposition and the government. That is why I believe it is a bad idea.
Thank you.