This is a study of two Australian learners of Indonesian during a short stay abroad. It examines their contrasting success in acquiring L2 address terms, in tandem with their contrasting experiences of the L2 culture setting. It thereby helps explain the persistent finding of great individual variation in L2 gains--and in particular pragmatic gains--during study abroad. The study shows that the contrasting success of these two learners is linked to their L2 identity development. At the same time, it dispels a simplistic view of the relationship between identity development and pragmatic development, by showing that their language outcomes emerge through a highly contingent process. The study also helps us understand how certain specific factors can influence learning of L2 pragmatics during study abroad, such as low initial proficiency, prior foreign language learning experience, timing of formal instruction, and the presence of peer L2 learners during naturalistic interactions.