”The choice is between "restaurateur" (the correct French form) and "restauranter" (a regular English form). Both are awkward; usage has chosen the first.”

Except that it hasn’t. ‘Usage’ has chosen ‘restauranteur’, which is neither the correct French form nor a regular English form - it’s a bastardisation of both.

It’s true that language evolves, and I’m certainly not agin that, but this one drives me nuts, pure laziness. And don’t get me started on the current BBC pronunciation fad of pronouncing ‘st’ as though there’s an ‘h’ in there - ‘shtreet’, ‘shtudent’ etc.