How to preserve the native language and culture of children in exile. The third part, "The Basics of bilingualism", is devoted to the phenomenon of bilingualism and multilingualism. The book is based on scientific research, as well as extensive material from the author's professional experience. It explains in an accessible language how the child's speech development takes place and how the acquisition of a second language, which must be mastered in immigration conditions, is integrated into this process. The book also examines the types of bilingualism and the features of the worldview of bilingual children. The book concludes with detailed answers to the most frequent questions from parents regarding the nuances of speech development of monolingual and bilingual children, and provides advice and recommendations on how moms and dads should act in a given situation.