How do you say upside down in French?

There are a few ways to say "upside down" in French, depending on the context and the desired nuance:

* À l'envers: This is the most common and general way to say "upside down." It literally means "in reverse" or "the wrong way around."

* Renversé: This is a more formal way to say "upside down" and literally means "overturned" or "turned over."

* Sur la tête: This is a more literal way to say "upside down" and means "on its head." It is often used for objects that are literally turned upside down.

* À l'envers et à l'endroit: This is a playful way to say "upside down and right-side up" and is often used to indicate that something is both ways at the same time.

The best translation will depend on the specific situation and the intended meaning. For example, if you are talking about a picture that is upside down, "à l'envers" or "renversé" would be appropriate. If you are talking about a person standing on their head, "sur la tête" would be a better choice.