How do you form a question asking what is your nationality in French?

The most direct and polite way to ask someone's nationality in French is:

"Quelle est votre nationalité?"

This translates to "What is your nationality?"

Here's a breakdown of the sentence:

* Quelle: What

* est: is

* votre: your

* nationalité: nationality

You can also use the more informal "Quel est votre pays d'origine?", which means "What is your country of origin?". This is more appropriate in casual settings.