The monograph is devoted to teaching borrowed vocabulary to high school students. The modern Russian language is rapidly replenished with borrowed vocabulary. This, in turn, leads to unreasonable and illiterate use of foreign words in different linguistic situations. To preserve the purity of the Russian language and, at the same time, to enrich the speech of the younger generation, it is important to solve a number of issues related to the penetration and use of borrowed words. The monograph is addressed to students - philologists of higher educational institutions, undergraduates, applicants, teachers and teachers, as well as the circle of readers interested in the problems of development of the modern Russian language.