Though informed by theories of learning motivation in mainstream psychology, motivation research in second language acquisition has evolved somewhat independently to address the unique social, psychological, behavioral, and cultural complexities of acquiring a new communication code. Founded in the bilingual context of Canada in 1959, second language motivation research originated in a social‐psychological framework implicating attitudes and relations among linguistic communities, as crystallized in the concept of a language learner's integrative orientation towards speakers of the target language. In the 1990s, researchers began to bring this motivation research in line with cognitive theories of motivation in educational psychology, leading to a sharper focus on language learning in classroom settings. In the 21st century, the dominance of English as a global language has contributed to a conceptual reframing of language‐learning motivation in terms of self‐and‐identity goals, because learners may see themselves as aspiring members of the global community of English speakers. However, researchers also now recognize the need to pay more attention to the learning of languages other than English and to the learning of multiple languages. Another area of current thinking is the individual–contextual interactions shaping the development of language‐learning motivation, particularly drawing on complex dynamic systems perspectives.