In the present study, we surveyed the English language-learning motivations of 518 secondary school students, university students, and young adult learners in the capital of Chile, Santiago. We applied multi-group structural-equation modeling to analyze how language-learning goals, attitudes, self-related beliefs, and parental encouragement interact in shaping motivated behavior and to investigate age- and group-related differences in the internal structure of language-learning motivation. We compared our findings with previous studies using similar instruments in different settings, and based on our findings, we proposed a new interactive model of language-learning motivation, which consists of goal systems, attitudes, self-efficacy beliefs, and future self-guides.