"improper language" is correct and usable in written English.
You can use it when referring to language that is not appropriate for a certain situation, usually due to being rude or offensive. For example: "His use of improper language was inappropriate for the formal setting."
"Any person using profane or otherwise improper language should be reported at this office immediately," the company said.
But Mr. Stern no longer has the ability to reach as wide an audience as he did while on terrestrial radio, where he was constantly battling against the Federal Communications Commission over improper language.
But the weirdest part of the "Today" interview was when she seemed to shift blame, criticizing her staff, presumably the black cooks, for any improper language used in her establishments.
It has been reported that staff members punched one child in the ribs and another was slapped several times on the head, with police in Kent saying they have been made aware of the claims of "unnecessary use of force and the use of improper language" at the facility.
The 42-year-old is accused of using improper "language and/or behaviour".
In fact, the correlation between "improper" language use and language-learning is proven to be positive.
There is concern that the use of improper and/or imprecise terminology, particularly language tied to concepts of "race" and "ethnic group" has the potential to both generate and reinforce racial and ethnic prejudices and diminish the clinical value of relevant research, as the massive literature shows [ 4, 5].
The usage of certain words or phrases based on the culture of a given society may be improper in the target language and/or culture.
Misuse of English conjunction related to incoherent writing, according to the literature, comes from learners' first language interference, improper mechanical exercises, and misleading lists of connectors in textbooks demonstrated as if mutually interchangeable without contextual constraints.
The former defender admitted a Football Association charge of improper conduct relating to his language and behaviour.
Mr. Barak called his minister's act improper and urged the use of diplomatic language in relations.
