Comparative law and legal language are two interconnected categories that play a significant role in modern jurisprudence both theoretically and practically. Comparative law serves as an essential tool for developing legal constructions that reflect best practices while preserving national specificities and legal traditions. However, comparative legal research inevitably encounters challenges primarily due to multilingualism and differences in legal terminology, leading to conceptual discrepancies in the interpretation of fundamental legal concepts. In this context, within the CIS, SCO, and EAEU regions, the importance of Russian language cannot be overestimated since it acts as a bridge between ethnic groups of the post-Soviet area, facilitating cross-cultural communication and international cooperation in shaping multilateral relations. In addition to linguistic aspects, Russian also touches upon foundational legal and cultural-civilizational dimensions in legal science.