Abstract: This article is dedicated to examination of the currently relevant question of linguistic variation. The goal consists in the analysis of key approaches towards studying the peculiarities of Mexican national version of Spanish. The subject of this research is the specificities of systemic, logical, linguistic, and cognitive-pragmatic approaches towards studying national versions of multinational languages. The starting point is the statement that problem of determination and structurization of approaches towards studying separate aspects of the genesis, statics and dynamics (state and functionality) of this national version of the modern Spanish lingual system requires a more detailed and thorough analysis. Within the framework of this article, the author considers the systematic, logical, linguistic, cognitive-pragmatic approaches and their specificity, substantiated by the peculiarities of studying linguistic and speech means of the Mexican national version of Spanish as an independent national-cultural model of the linguistic worldview. Russian and foreign Romance philology has a number of works dedicated to the topic at hand. However, the question of systematization of approaches towards studying separate aspects of development, current state, and national-cultural specificities of functionality of phonetic, lexical, and grammatical linguistic units, which determine the differences between Mexican national version of Spanish and other versions, remains unresolved.