Two friends of ours - let's call them Leonard and Virginia - long ago solved the difficulty of commenting to one another on the foibles and oddities of other people present without the risk of being overheard: they make all such observations in French.
On one occasion, while on holiday, Virginia - who has become a tad forgetful of late - made several indiscreet remarks to Leonard about someone in the hotel dining-room in a voice that was far from subdued. She neverthless felt utterly secure in the belief that her observations couldn't possibly give offence, since she was making them in French.
"For God's sake, Virginia, what are you doing?" hissed Leonard in English. "We're in NICE --- where they tend to speak FRENCH!"
[Image: Holiday-makers in Nice © Brian Sibley 2007]