Colloquiality as a concept of the history of language

Speech phenomena have long been the object of consideration in the history of literary language. They were interpreted as phenomena of vernacular speech, since the subject of this branch of linguistics is the study of the ways of formation of literary language against the background of interaction with spoken language, which has areal and social differentiation. The need to use the terms vernacular language, vernacular element, vernacular style disappeared due to two factors: 1) the researchers linked these concepts with a certain abstract model in the general picture of the history of the literary language, the formation of the Ukrainian literary language based on written sources and the influence of the language of folklore; 2) in stylistics, a colloquial (colloquial and everyday) style of literary language was distinguished, which is based on oral colloquial everyday language with territorial and social variants