The article aims to analyze the category of "language behavior" in modern linguistic research. It states provisions of the communicative interpretation of the logical-semantic structure of utterances to determine their ethnocultural features. The author of the article suggests considering proposition, modus and dictum within the implementation of national communication behavior. It is shown that the propositive structure, modality and nomination methods selected for communication have certain ethnocultural features since different languages reflect their own immanent preferences in terms of logic, semantics and strategies for achieving communication goals. The author also outlines prospects for the application of this methodology in line with the identification of the dominant features of national linguistic identity.