keep a civil tongue in your head

US /kiːp ə ˈsɪv.əl tʌŋ ɪn jʊər hɛd/
UK /kiːp ə ˈsɪv.əl tʌŋ ɪn jʊər hɛd/
"keep a civil tongue in your head" picture
1.

manter a língua civilizada, falar educadamente

to speak politely and avoid rude or offensive language

:
You need to keep a civil tongue in your head when talking to your elders.
Você precisa manter a língua civilizada ao falar com seus mais velhos.
Even when angry, try to keep a civil tongue in your head.
Mesmo com raiva, tente manter a língua civilizada.