A common expression or phrase that has become a standard part of a language through regular use

A fixed phrase or colloquial expression commonly used in speech, often with a metaphorical or figurative meaning; typically three characters long but lacks a classical or literary origin.

trendy expression or buzzword currently in popular use

Words and phrases used to show respect and courtesy to others; examples include "please", "excuse me", and "thank you".

words and phrases used specifically on the internet; netspeak; cyberspeak

idiomatic expression; a habitual form of speech; an established phrase or expression characteristic of a language

A common language used for communication between people who speak different native languages; lingua franca

The study and application of linguistics to practical areas like language teaching, speech therapy, translation, and standardization.