Definition & Meaning of "[mind|watch] {one's} (language|tongue)"

What is the origin of the idiom "mind one's language" and when to use it?

The idioms "mind one's language" has its origins in the idea that the words one chooses to speak can have significant consequences, and it is important to be cautious about the language you use. The phrase is often used to remind someone to speak more politely, refrain from using offensive or inappropriate words, or exercise self-control in their speech. The idiom highlight the importance of choosing one's words carefully to avoid causing offense or misunderstanding.