Ruthenian language
"c."Before the Khmelnytsky Uprising, the "sejmiks" of the Kiev Voivodeship and Bratslav Voivodeship deliberated in the majority Ruthenian language, despite the increasing proportion of the Polish and Lithuanian "szlachta" settled there. Among the one hundred researched Ruthenian noble families from the region, most were opposed to the Union of Brest and almost all fought under Bohdan Khmelnytsky's command.