What is a Chocolate pie called in french?

There's no single, direct translation for "chocolate pie" in French. It depends on the specific type of pie:

General terms:

* Tarte au chocolat: This is the most common and generic term, literally translating to "chocolate tart."

* Gâteau au chocolat: This means "chocolate cake," which can sometimes be used for a pie-like dessert.

More specific terms:

* Tarte au chocolat noir: "Dark chocolate tart"

* Tarte au chocolat au lait: "Milk chocolate tart"

* Tarte au chocolat blanc: "White chocolate tart"

* Tarte au chocolat à la crème: "Creamy chocolate tart"

* Tarte au chocolat et aux noix: "Chocolate and nut tart"

Ultimately, the best French term for "chocolate pie" will depend on the specific ingredients and style of the pie you're referring to.