A question that's always interested me

With all the talk about Harper's cabinet, its strengths and weaknesses, I'm curious to know how cabinet discussion works.

Considering that Canada is at least in theory a bilingual nation, how does language function when it comes to cabinet meetings?

With Quebec's five ministers, I'm certain that at least 3 of them speak good English (Fortier, Bernier and Cannon), but what about the other two whose English appears to be rather weak? (Blackburn and Verner)

And what about the possibility of unilingual francophones as cabinet ministers? When was the last time that happened?

Would they just have a translator sit in on these supposedly highly secretive cabinet discussions?