Don:
They never left.
RCI now programs to Canadians living abroad, rather than to foriegners. Much CBC network.
But according to the schedule, a lot of their programming is in Arabic, Mandarin, Spanish and Portuguese.
I used to listen to "As It Happens" (kind of a Canadian version of All Things Considered) every evening in the 49m band at dinner time on the portable radio. When they made the budget cuts I didn't hear them any more, so I assumed they did like BBC and some other major broadcasters and discontinued the service.
I have always enjoyed Canadian radio, but Canadian TV sucks.