Problems of Studying Linguistic Influences in the North SlavicBaltic Contact Zone

The immense contribution of the late Professor G. A. Tsykhun to global Slavic studies continues to inspire heuristic research, particularly in the study of linguistic influences within the North Slavic­Baltic contact zone. G. A. Tsykhun emphasized the importance of a comprehensive analysis of the historical contexts that shaped Belarusian­Polish interactions over space and time. This article builds upon G. A. Tsykhun’s legacy, focusing on the phenomenon of isoglosses with a unified center of expansion, which are documented in the North Slavic­Baltic contact zone as correlates of Belarusian­Polish interactions. To establish the motivations and nature of these linguistic features, a broad spectrum of associated problems and factors must be considered. This publication offers a selective analysis of these elements.