This article presents selected results from a large-scale, mixed-methods, federally funded investigation of US-based language study-abroad alumni of all ages, which included a nationwide survey (N = 4,899) followed by professional life history interviews with 54 participants. Here, we focus on three questions heretofore unaddressed: (a) How do these alumni continue to use their additional languages? (b) How is long-term language use associated with various study-abroad program features? and (c) How is the role of program features reflected in life history narratives? We found that 79% of participants use their languages in at least one of the activities listed on the survey, though this use is generally confined to informal, interactive tasks. Our examination of program features using multiple regression revealed that while all features were statistically significant predictors for long-term language use, those involving engagement with local communities (e.g., close personal relationships) showed more relative importance. Contextualized with a sample of our qualitative data, findings from this study offer a macrolevel confirmation that local engagement during study abroad retains its significance for language use over the long term and provide implications for designing study-abroad programs that involve language learning.