how do you say "be quite everyone"
When talking to a bunch of people and want them to be quite. Be quite everyone
You can either say:
Silencio, por favor.
The 2nd one is stronger.
My Unabridged Collins gave an example in the entry for the pronominal form of callar, callarse.
callarse VPR 1 (= dejar de hablar) to stop talking, go quiet al entrar el profesor todos se callaron when the teacher came in, everyone stopped talking o went quiet
¡cállense, por favor! please be quiet!
I think you mean "Be quiet, everyone!"
And I am going to guess that the verb you need is "callar"
callar; Synonyms: hush, shut up, silence, hush up, quieten, still;
And the command form can be found here at Span¡shD!ct.com:
(you singular) calla (usted) calle
(nosotros) callemos (you, plural) **callad** (they) callen