Abstract
The article examines the phenomenon of interlanguage polysemy in the context of the Russian-Czech interference; its varieties and peculiarities are highlighted. As an illustration of the phenomenon a new material is used: electronic learning Czech corpus which has allowed expanding the base of error examples.
In the course of research, the main cause of frequent interferemes in the area ofinterlanguage polysemy has been revealed: discrepancy of the semantic volume of lexical units of the Russian and Czech languages.