"Veux-tu manger quelque chose ?"
Translation:Do you want to eat something?
We use both some and any in questions. We use some/somebody/something to talk about a person or thing that we know exists, or we think exists: Are you waiting for somebody? (I think you are waiting for somebody) We use some in questions when we offer or ask for things: Would you like something to eat? (there is something to eat) Can I have some sugar, please? (there is probably some sugar I can have) But in most questions, we use any. We do not know if the thing or person exists: 'Do you have any luggage?' 'No, I don't.' I can't find my bag. Has anybody seen it?(R.Murphy, pg.170)