Nice last name is: joli prénom
vous avez un joli nom
Son nom de famille est... [Her last (family) name is...]
you say 'agréable'.
You would say "Quel est votre nom de famille?" in French to ask someone for their last name.
In French, 'bon voyage' means 'have a nice journey'.
'your the nice one' in french is 'votre la belle'.
When it's a first name or a last name it's the same as in English
The only correct plural for French is French. "Frenches", as you say, or 'Frenchies' is a derogatory slang term.
It tastes nice is "ça a bon gout" or "c'est bon" in French.
allons à Nice
gentil/gentille
Travail