Questions about example sentences with, and the definition and usage of "Bonne"

A: Good night my love

A: this is French
bonne nuit is goodnight
bonsoir is good evening

A: Good reading!

A: “3,2,1, happy new year!” *start hugging* “do you have to do that every time the microwave starts?”

Hope that makes sense

A: Have a nice day!

A: We just say Bon Appetit, actually!

A: Good day/ Have a good day.

A: Merci

A: Goodnight

A: It means 'Good Luck!' in French. A lot of Americans like to throw bits of French and Spanish into conversations (no full sentences, just phrases). Although, I wouldn't say this specifically is the most common thing to say. I hear people say Buena Suerte more often than Bonne Chance.