That's just her.
So you're telling us that everyone else in the shop who surrounded her (including the woman who first came to her help) don't speak French????! And you believe those locals can't tell a foreign accent from a local one or recall seeing the pixelated Black man in the CCTV footage????!
uh huh your "logic" and one hell of a trip you're on.
As to the rest of your pathetic excuse making and logic, your French friends suddenly can't speak French or tell a foreigner from a local/regular just because you've decided you can't.
No wonder they're falling off their chairs from your repeated stupidity.
Good luck with the rest of your Can-can't performance - break a leg!