To what extent can we speak of second dialect acquisition in English L2, and the mechanisms of accommodation in L2 contexts? In contact between different dialects, accommodation is deemed social or mechanical—thus consequent on speaker attitude or frequency of interaction with the new dialect. Drawing on sociophonetics, this study investigates the workings of accommodation between L2 English dialects, using data from mobile Igbo English speakers and lifelong Yoruba counterparts in Southwest Nigeria. The Igbo speakers come from Eyinmba Central Igbo (ECI) region whose L1 lacks the open-mid vowel [ɛ], resulting in the fusion of dress/ɛ/ with face/e/ in their English. An emergence of contrast between the phonemes might be indicative of new dialect aquisition. Overall, a process of convergence as an outcome of accommodation to Yoruba English was established. Younger speakers converged more, while variation within the older speaker-group signalled ethnic bias and social network. The findings suggest that the influence of speaker attitude, age-group and interactional frequency can be composite, and synchronously correlative with the degrees of convergence.