I can't speak to that in detail, but I can say that, in one of its rulings, the Supreme Court agreed with the decision of courts in British Columbia to refuse documents submitted in French, such as affidavits that formed part of the evidence provided by the parties. Clearly, then, in some court systems in the country, such as British Columbia's, it is acceptable to refuse French-language documents, and the Supreme Court even recognized that.
On March 27th, 2014. See this statement in context.