Language learning in adulthood is often believed to be influenced by maturational constraints. However, recent research suggests that social and psychological factors can shape exceptional phonological outcomes. This multiple-case study explored the experiences of five adult learners who can (momentarily) pass for native speakers of Quebec French. Participants provided retrospective diaries and participated in semi-directed interviews to discuss their communicative goals, challenges, and strategies. The data were analysed to assess the role of conscious phonological development and self-regulated learning strategies in developing passing abilities. The results revealed that pronunciation was not a central theme. One participant used strategies to sound local for linguistic capital, while another aimed for intelligibility over native-like pronunciation. The remaining three participants appeared to achieve exceptional phonological outcomes more unconsciously. These findings highlight the complex interplay of linguistic, social, and psychological factors in adult Lx learners’ development, offering new insights into passing.