There are some very serious intensive and complete immersion foreign language programs around. I have seen some of them. At the best of them one is not allowed to use any other language (for any reason) than the one you are trying to learn. Good idea, and it works. But this particular example, it must be said, is ridiculous. A blind Quebec student, who was denied entry to English classes at a Canadian university because his guide dog responds only to French commands, will be allowed to attend class, the school said.
Yvan Tessier was initially turned away from an English immersion course at the University of New Brunswick because he would be forced to give his dog, Pavot, instructions in French. He uses seventeen commands in French.