EN
The aim of this paper is to ponder on how the codeswitching phenomenon can impact the shaping of a sociolect. For this purpose, the psycho-, sociolinguistic and grammar-based definitions of the Codeswitching phenomenon as well as its typology were presented. In the next part the attention was paid to the kinds and probable reasons of codeswitching that stem from the analysis of the example expressions brought out by the examined group of bank employees. The latter part was an attempt to answer a question to what extent the codeswitching phenomenon shapes the development of a sociolect.