A private business model for multilingual broadcasts
While the ATSC standard and equipment can do it, the budget for simultaneous translation services would be huge, and I would say goes against the CBC's mission statement let alone its funding.
Here's a business model that might be of interest to large ethnic groups in specific linquistic areas of Canada: (such as Punjabi in Surrey, BC, etc.) approach the authorities and the CBC for affiliate rights to broadcast the original CBC ATSC feed stripped of its audio streams, which are replaced with overdubbed, real-time translation into one or more languages. Since the original CBC station is still running in the market, simsubbing could also be allowed for local commercials in those specific languages.
This frees up the CBC from having to make public policy decisions that might be considered against its mission statement and for which some Canadians may take exception.