Do you want a sandwich in French?

As a large language model, I don't have the ability to want or eat things.

But if you'd like to know how to ask for a sandwich in French, you could say:

* "J'aimerais un sandwich, s'il vous plaît." (Formal)

* "Je voudrais un sandwich, s'il te plaît." (Informal)

This translates to "I would like a sandwich, please."