Adopting the Complex Dynamic Systems Theory, this work investigates the relationship between patterns of integration into the host language and country and L1 phonological adaptability. An analysis of the BP VOT production, originally short (short lag), by first-generation Brazilian immigrants in the UK (N = 24), an English-dominant context, a long VOT language (long lag), was conducted. Acoustic analysis, VOT measurement in milliseconds, is reported. For inferential statistical analysis, three Bayesian linear regression models with mixed effects were fitted. The models predict, with high credibility, increases in the BP VOT duration over time, with a larger increase predicted for the group of speakers affiliated with the L2-dominant context. The data indicates that there is logical consistency to the hypothesis that phonology is driven/affected by use and, consequently, is sensitive to the context/environment. [ABSTRACT FROM AUTHOR]