Mind/watch your language verb phrase
Be careful about what you say in order to avoid to upset or offend someone
Hey! Watch your language or you're out of here!
Parents need to mind their language to set an example for the kids.
You'd better watch your language around here.
Used to describe someone kind, calm and pleasant
You can get what you want from people more easily with a positive attitude and politeness rather than being aggressive or demanding.
To have the right to speak at a formal event
Used to ask someone to speak more quietly
Friendships will develop well and be successful when the friends respect each other's privacy.
You should respect your friend's privacy. A hedge between keeps friendship green.