How do you say i know what mean in french?

There are a few ways to say "I know what you mean" in French, depending on the context and nuance you want to convey:

Formal:

* Je comprends ce que vous voulez dire. (This is the most literal and formal translation.)

* Je sais ce que vous voulez dire. (This is also formal, but slightly more direct.)

* Je sais de quoi vous parlez. (This means "I know what you're talking about" and is more natural in certain contexts.)

Informal:

* Je vois ce que tu veux dire. (This is the most common informal translation, similar to "I see what you mean.")

* Je comprends ce que tu veux dire. (This is also informal and a good option.)

* Je sais ce que tu veux dire. (This is slightly more direct, but still informal.)

Other options:

* J'ai compris. (This means "I understood" and can be used in situations where you've already been listening to someone and want to acknowledge you understand their point.)

* C'est ça. (This means "That's it" and is a short way of saying "I agree" or "I understand.")

The best way to say "I know what you mean" in French depends on the specific situation and the level of formality you want to convey.