Strategy of development of speech in kindred language (such as Russian and Belorussian) in preschoolers includes: (1) relatively spontaneous mastering of verbal skills in everyday communication, and (2) specially organized training of standardized verbal means. In class development of speech in relative language is based on forming of linguistic generalizations. Bilingual situation demands concordance of contents of training the second language with skills and know-ledge that children have obtained in the process of acquisition of the first one. Important condition of obtaining correct speech in relative language is comparison of linguistic phenomena in both languages.