say nothing
I don't say anything.
Ne demande rien, ne dis rien !
Don't ask anything, don't say anything!
Ne dis rien à ma petite amie !
Don't tell my girlfriend anything!
No, don't say anything.
Ne dis rien et je te donne six heures pour te rendre.
Don't say anything, and I'll give you six hours to turn yourself in.
— Detective Chinatown (2015)
Tu ne la préviens pas, tu ne dis rien.
You don't warn her, you don't say anything.
— Intouchables (2011)
Ne dis rien que tu puisses regretter plus tard.
Don't say anything you might regret later.
So don't say anything.