The article examines the issue of variability in language and linguodidactics, presents variable forms of language functioning, and comprehends the status of variability in the modern education. The authors substantiate everyday colloquial speech practice as a social and functional option and its inclusion in teaching German as a foreign language. The purpose of the work is to reveal the motivating linguistic and methodological potential of the German colloquial speech, to update for linguistic students the features of colloquial vocabulary and syntax in comparison with basic normative structures, and to attract students’ attention to the functional areas of colloquial speech. The article presents the authors' experience of using interactive technologies that reveal expressiveness of conversational structures developing linguistic intuition and metalinguistic skills. The authors demonstrate methods of presenting material that encourage students to creatively solve linguistic tasks to reveal the language variability.