How do you ask what language someone speaks. in french?

Here are a few ways to ask what language someone speaks in French:

Formal:

* Quelle langue parlez-vous? (What language do you speak?)

* Parlez-vous français? (Do you speak French?)

Informal:

* Tu parles quelle langue? (What language do you speak?)

* Tu parles français? (Do you speak French?)

You can also ask in a more specific way, like:

* Quelle est votre langue maternelle? (What is your native language?)

* Quelles langues parlez-vous couramment? (What languages do you speak fluently?)

Tips:

* Use the formal form (vous) when addressing someone you don't know well or in a formal setting.

* Use the informal form (tu) when addressing someone you know well, like a friend or family member.

* If you are unsure about someone's level of French proficiency, you can start with a simple "Bonjour!" (Hello!) and then ask "Parlez-vous anglais?" (Do you speak English?)

Remember to be polite and patient when asking someone about their language skills.