* D'accord: This is the most common and versatile translation. It means "agreed" and can be used in a variety of situations.
* Bien: This means "good" and is often used as a synonym for "okay" in informal settings.
* OK: You can also use the English "OK" in French, although it is less common than "d'accord".
So, the best way to say "okay" in French depends on the specific situation.