How do you say Good night Ladies and Gentlemen Have sweet dreams or beautiful nightmares in French?

Here's how you can say "Good night Ladies and Gentlemen, have sweet dreams or beautiful nightmares" in French:

Formal:

* Bonne nuit, Mesdames et Messieurs. Faites de beaux rêves ou de beaux cauchemars.

This is the most direct translation and is appropriate for formal settings.

Informal:

* Bonsoir tout le monde. Faites de beaux rêves ou de beaux cauchemars.

This is more informal and could be used with friends or family.

Note: In French, it's common to wish someone good night with just "bonne nuit" or "bonsoir." You can add "Faites de beaux rêves" if you want to specifically wish them sweet dreams.