How do you say not French in French?

There are a few ways to say "not French" in French, depending on the context:

Formal:

* Pas français: This is the most literal translation and is the most commonly used.

* Non français: This is a more emphatic version of "pas français."

Informal:

* Pas du tout français: This means "not at all French" and is more informal.

* Pas français du tout: This is another way to say "not at all French" and is also informal.

When referring to nationality:

* D'une autre nationalité: This means "of another nationality" and is a good option when talking about someone's origin.

Example:

* Je ne suis pas français. (I am not French.)

* Ce livre n'est pas français. (This book is not French.)

* Elle n'est pas du tout française. (She is not at all French.)

* Il est d'une autre nationalité. (He is of another nationality.)

The best choice will depend on the specific situation and the level of formality you wish to convey.