"Tu manges les crêpes, tu bois du vin."

[Deeter]

How do you figure out if crêpe is plural from this context?

[Kyozaki]

Crêpe is feminine, so the singular would be "la crêpe". So we can assume this is plural as a "leh" sound is used; "Les crêpes". But i'm going to be real I got it wrong too, I had to research that lol.