EN
In the following article the author defines the range of the so called mediatory language (mediační jazyk), paying attention to its basic factors which have to be taken into consideration when teaching Czech as a foreign language. The very term is defined as a code of communication (first and foremost the natural language, but also the non-verbal means of communication), which serves to enable the didactic process between the teacher and the student. The mediatory language not only acts as an agent in the communication between the teacher and the student, but also has the communicative, contact, cognitive, connotative and metalanguage functions.