Abstract

The article aims to verify the thesis about the existence of one Uniate variant of the Church Slavonic language in the Ruthenian lands of the former Polish-Lithuanian Commonwealth. This thesis was presented in research on the Vilnius edition of Ecphonemata Liturgiey Greckiey from 1671 made by Ukrainian and Russian philologist – Anna Bolek. The analysis of the phonetics of the two editions of the text Ecphonemata Liturgiey Greckiey (Vilnius 1671 and Poczajów 1784), issued in Latin script, leads to a different conclusion. In two dialectal areas: Belarusian and Ukrainian, there were different variants of the Church Slavonic language used in the Uniate Church that corresponded to the local pronunciation / literary tradition.