When I ask a group of people to 'be quiet', I don't want to say 'shut up'. What is a more polite way to ask people to 'keep it down'.

more polite
Keep it down please. - Fè yon ti silans silvouplè.
Be quiet. - Fè silans

less polite
shut your mouth - pe bouch ou, fèmen bouch ou
shut it - pe la

(The following two are downright vulgar.)
shut up - pe dyòl ou
shut up - pe bèk ou
Shut up - fèmen dan'w
Shut up! - Pe dan'w la!

Ask me anything