Oui 

That’s how you say “Yes“

(insert Oui audio)

Non

That’s how you say “No“

(insert Oui audio)

Simple right ?

Ouais and Nan

“Ouais” is the informal way of saying “Oui“, it’s like “yeah/yup” and you would use it with friends.

(insert ouais audio)

“Nan” is the informal way of saying “Non“, it’s like “nop“.

(insert nan audio)