This research work deals with the lexical and grammatical features of the English language variant widely used in Africa. The importance of the use of British English is also taken into account, as well as its transformational processes due to the interaction and mutual influence of local dialects on its structure. Examples of neologisms and modified lexical units are given, based on the influence of local culture and the lack of an equivalent in the recipient language. The article pays attention to the grammatical aspects of language in the functioning of phrasal, modal and prepositional verbs, and also reveals the peculiarities of articles and pronouns use due to the influence of autochthonous languages. The aim of the research work is to identify the specifics of the linguistic and cultural adaptation of the English language in Africa and systematize the lexical and grammatical aspects of the English language as the territorial variant type. The choice of working methods is determined by the goals and objectives of the study. In the research work the method of metalinguistic analysis, methods of contextual and definitional analysis, methods of systematization and classification of linguistic material are used. As a result of the work the high productivity of the realities functioning in autochthonous languages in the lexical structure of the English variant in African countries and the lexical borrowings of terms from autochthonous languages are revealed. This trend is also emphasized in the borrowing of entire lexical phrases from the thesaurus of native languages. With regard to the grammatical part, a significant deviation from British English is emphasized. The research work results in such grammatical changes as: the use of auxiliary verbs together with semantic ones; the functioning of a simplified form of modern forms of the verb; the productive use of uncountable nouns in speech in the form of a countable nouns; significant deviations from British English in the process of using articles, personal and possessive pronouns.