language A1

/ˈlæŋ.ɡwɪd͡ʒ/ A system of words and grammar used by the people of a particular country or community to communicate.

lingo C2+

/ˈlɪŋɡoʊ/ the specialized vocabulary or jargon of a particular group

lingua C2+

/ˈlɪŋɡwə/ a tongue or tongue-like part; a language (as in lingua franca)