It's silly to want Americans to speak English? Besides how do you know their kitchen staff are illegals or even legal immigrants who don't speak English? I say hurah for this guy and may we have many more like him.
I agree with the previous poster.
It's not only silly but it's stupid from a business point of view.
If your customer has $$$ to pay, then you do all you can to accomodate him regardless.
This entire thing is infantile.