I think that that would be an incredible idea. Just as Vacdeil said, there are always tons of people always welcome to come. Also, the language situation has never really been a problem. A lot of the players (myself actually) are biligual, so translating and understanding eachother should be simple.
Eh, if you play the card game, it implies that you should at least know enough english to understand the cards, and other than that, basic turns and jutsu chains are very simple to depict with hand motions.
Please bring a SJC to montreal, theyll be a lot of people, there wont be any problems, and well all have a lot of fun