Abstract: The goal of this research is the comparison of identity factors that contribute to strengthening and determination of affiliation of an ethnocultural group in a foreign language environment. The subject of this research is the examination of peculiarities of language factors as an element of preservation of identity and identification of a minority ethnocultural group of Molokans residing in the territory of Azerbaijan since the early XIX century. The author reviews certain identity structures of the Molokans that assist preservation and unification of the group. Research methodology is based on the sociolinguistic practice, surveys and interviews carried out in the rural localities Ivanovka and Novosaratovka, as well as places of residence of the Molokans in Azerbaijan. The scientific novelty consist in comparative study of Molokans in the two regions of Azerbaijan, their views upon identity, lifestyle and living conditions, and linguistic peculiarities. A conclusion is drawn that Molokans consider themselves Russians; the role of language within the identity structure of Molokans plays a crucial role; language factor dominates in formation of ethnic identity and ethnic mentality, which develops in the early childhood. The results of this work can be valuable in studying the language factor as the basis in preservation of identity of small-numbered peoples after migration.