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n'en sait rien

knows nothing about it

→ ne
phrase Uncommon #10,845
knows nothing about it The subject is usually stated before this phrase; “en” refers to something already mentioned or understood.
FR: Il n'en sait rien.
EN: He knows nothing about it.

Personne n'en sait rien.

Nobody knows anything about it.

Le maire n'en sait rien, OK ?

The mayor knows nothing about it, okay?

— Do the Right Thing (1989)

Non, on n'en sait rien.

No, we don't know anything about that.

Papa n'en sait rien.

Dad has no idea.

— The Wandering Earth 2 (2023)

On n'en sait rien.

We have no idea.

— Piège de cristal (1988)

Mais ça, pour le moment, elle n'en sait rien.

But for now, she has no idea about that.

— Le Fabuleux Destin d'Amélie Poulain (2001)

On n'en sait rien Monsieur.

We have no idea, sir.

— Rise Roar Revolt (RRR) (2022)

Mais on n'en sait rien.

But we don't know anything about it.

Elle n'en sait rien.

She doesn't know anything about it.

— Le Ruban blanc (2009)