Aim. Identification of the linguistic and cultural specific features of the English language functioning on the territory of Nigeria. Methodology. The research is based on the application of general scientific methods (analysis, generalization) and special methods (descriptive method, component analysis method, quantitative method). Results. The most productive transformation processes of the English language of Nigeria due to the influence of creolization are revealed: monophthongization of diphthongs for the phonetic system; simplification of specific verb forms for the morphological system; use of high-frequency cultural borrowings from autochthonous languages for the lexical system. Research implications is in the analysis of Nigerian English transformational processes potential due to complex language and culture symbiosis. The structure of Nigerian English is influenced by two key processes: indigenization and globalization which contributes to the preservation of its unique features, reflecting the specifics of the Nigerian linguistic culture.