What is latte in french?

It is also a "latte" in France, since the arrival of Starbucks.

Before that, and still now, the traditional milk coffees in France are:

• The "café au lait" is an espresso with milk, but not as much as in a latte, served in a small cup.
• The "crème" or "café crème" is an espresso with half and half (milk and cream), served in a small cup.
• The "grand crème" is a double espresso with half and half served in a medium cup.
• The "noisette" is an espresso with a drop of cold milk.

A grand crème and croissants on the terrasse of a café in the boulevards of Paris early in the morning is the real deal for breakfast...