This paperwork is based on microsociolinguistic research perspective. Speech material was recorded in group of eight young people during nonofficial endurance. The main objective of this paperwork is detail analysis of foreign elements used by Polish youth and presence of their functions in communication process. There were used two research methods: questionnaire and tape-recording of speech during meetings, which topic was religious issue. One part is dedicated to citations (interferences) – elements from foreign languages included into Polish syntax context, which lack any designators of adaptation of grammar and phonetics. In case of classification of citations grammar criteria was accepted as overriding. On this basis all foreign interferences were classified according to parts of speech. The other part of this paperwork presents inputs of longer expressions into speech, which in literature are defined as code switching.