About the Language of Acts Grodno Zemstvo Court

This article, for the first time in scientific literature, presents comments about the language of documents of the Grodno Zemstvo Court, the oldest in the territory of the Grand Duchy of Lithuania. These documents were written in the 16th century in Cyrillic and published in XVII vol. of the Act of the Vilna Archaeographic Commission. The article presents promising directions for the study of these documents, and special attention is paid to the impact on their vocabulary of the Polish language and the functioning of the Belarusian dialects of the Grodno region