How do you say we know in french?

The most common way to say "we know" in French is "on sait".

Here are some other ways to say it, depending on the context:

* Nous savons: This is the more formal way of saying "we know."

* On le sait: This means "we know it."

* On connaît: This means "we know (something or someone)."

* On est au courant: This means "we are aware."

* On est renseigné: This means "we are informed."

The best way to choose the right phrase depends on the specific situation and the level of formality you want to achieve.