The phenomena of language interference at the morphemic level as a type of grammatical interference were not accepted by the linguists who considered morphological interference impossible. However, there are linguists who claim that in language contacts morphological systems of languages affect each other and they consider it quite acceptable. Divergences in morphological systems of contacting languages cause morphological interference in bilinguals speech. Morphological peculiarities of contacting languages explain the reason of such deviations. Morphemes are two-sided units which are identified by the unity of phonetic or exponential (expository) and semantic features. Due to major differences in morphological structures of English and Azerbaijani languages, Azerbaijani students confuse English morphemes with the morphemes in their native language that is reflected in the phenomena of morphemic interference in their speech. So, in the study of morphemic interference it is significant to consider the types of contacting languages that is the basis of typological research in condition of bilingualism and language contacts.