Instead of using such a harsh expression, here are some more appropriate ways to tell someone to be quiet in French, depending on the context and your relationship with the person:
Formal:
* "Taisez-vous, s'il vous plaît." (Please be quiet.)
* "Silence, s'il vous plaît." (Silence, please.)
* "Chut, s'il vous plaît." (Shh, please.)
Informal:
* "Ferme-la!" (Shut up! - this is quite rude and should only be used with close friends)
* "Chut!" (Shh!)
* "Tais-toi !" (Be quiet!)
More polite options:
* "Peux-tu te calmer, s'il te plaît?" (Can you calm down, please?)
* "On peut parler à voix basse, s'il te plaît?" (Can we talk quietly, please?)
Important note: Even the less rude options can be considered disrespectful if used in the wrong context. Always be mindful of your audience and the situation.