You're hilarious, Beav. You ever hear a word of French spoken at Schwartz's, on either side of the counter? Me neither. The clientele (my guess) is 80% tourist, 15% Anglo, 5% Franco.
As for Katz's, they don't mention cheese because no one in their right mind would ever ask for it. And as for the Reuben, the last time a Reuben was made with pastrami was, um, never. That's a malaprop on the Katz's menu since, never having been to Montreal, they apparently don't know that a Reuben is made with corned beef or smoked meat, a Rachel with Pastrami.
Board Stiff famous? Only to merb's illustrious Official Historian. He hasn't been mentioned, thought of, disparaged, or the like since like 2005. It's 2018 dude, don't let the years pass you by.
BTW, just a week until the anniversary of the great vanishing. When the time comes, I'll PM you with the whole story of the dossier that brought him down.