The project studies the address system in Chilean Spanish, characteristic of its threefoldness (tú, usted, vos + own verb conjugations), the increasing use of the hybrid 'tú + vos-verb conjugation' and the high frequency of strategic politeness alternations between the three forms. The investigation analyses social, geographical of strategic politeness alternations between the three forms. The investigation analyses social, geographical and contextually-specific influences on the phenomenon based on an enquiry and audiorecordings in the speech community.