The article analyzes the research of language competence of subjects of bilingual environment and modern educational Internet resources. The purpose of the work was to identify the level of language competence of future teachers, subjects of the bilingual environment. The main research methods are: theoretical analysis of literature on the research problem, survey, observation, testing, analysis of results. The work analyzes the concept of “language competence”, its structural components are singled out. The concepts that constitute phonological, lexical, grammatical, spelling competencies are considered. The approaches to the definition of the language competence of D. Heymz, M. N. Vyatyutneva, I. L. Bim, A. R. Arutyunova, and A. N. Shchukin are analyzed. The components of language competence are distinguished: knowledge (cognitive component) and skills (activity component), and conclusions are drawn that the language competence can be considered as knowledge of language units, the rules of their formation and use, and the ability to use them in the process of communication. The study presents the results of diagnostics to identify the level of language competence (phonological, lexical, grammatical and spelling) of the students of the Psychological and Pedagogical Faculty of the Mari State University as subjects of the bilingual environment. The results of testing according to the norms of the Russian language are analyzed in detail, since by the given diagnostic method the results turned out to be the worst of their three proposed diagnostic techniques. Typical mistakes made by bilinguals in Russian are noted and their occurrence, first of all, by sound-producing skills, stylistic formulation of speech of the native language is explained. The analysis of interactive programs and educational Internet resources aimed at studying the most popular European languages and studying the national languages of the peoples of Russia is given. The possibilities of the language virtual space in the correction of speech disorders and the increase of the level of the language competence of subjects of the bilingual environment are determined.