EN
Cleft lip and palate belongs to the most severe developmental defects. Its treatment is longlasting and requires multidisciplinary approach, while its stigmatization in the form of disturbance of facial aesthetics and/or speech disorders often remains forever, despite long and complex surgical treatment, correction of occlusion and laborious speech therapy. The speech of a patient with cleft lip and/or palate (henceforth: cleft lip/palate) reflects the location and extent of the anatomical defect. In cleft palate speech, one can distinguish active and passive compensations of the structural disorders. This article presents a less widely known visual aspect of cleft lip/palate speech production, i.e. compensatory facial movements during speech, as well as dysfunctional activity of the tongue that is inserted between the teeth or even operates outside the oral cavity in the production of anterior sounds in patients with considerable maxillary hypoplasia and occlusal disorders typical of cleft lip/ palate manifested as severe pseudo-progenia.