The article studies the Cologne dialect in the process of its historical development. The current state of the dialect is notable for a wide and in different ways varied range of regional, social, functional and stylistic layers (levels) in close coordination with one another. Notably, this system is not stable, it constantly changes under the influence of the social, technical, cultural, historical and other factors. The research on language change often disregards the dialect material featuring prominently in the historical context of linguistics.
