Bull Crap ... mine is a USA car without French decals.
Dealer is getting you to bend over ...
Canadian Tire gives the RIV sticker for the door which makes the car legal. After that they can go pound sand or French kiss a Moose.
If it's something you want to do, find a Canadian Car, take a picture of the visor's decal, print it out, trim to size and use contact adhesive to mount on the visors. Cost ... about $20 CDN max.