コサック国家の公用語は何だった？
The Hetmanate used Polish currency, and Polish as an administrative language and a language of command. However, after the Truce of Andrusovo in 1667, the "simple language" (), or the commonly spoken vernacular language of Ukraine, began to be written down and widely used in official documents of the Cossack Hetmanate. This is known as the modern Ukrainian language.
Polish