Dörnyei’s (2005) research radiates positivity, emphasizing the crucial role of motivation in language learning beyond traditional methods. The study investigated 261 undergraduate students in Thailand studying languages other than English (LOTEs), utilizing Dörnyei’s L2 motivational self-system (L2MSS) theory. Employing a mixed-methods research approach, the study explored participants’ motivational profiles through questionnaires and voluntary interviews. The findings reveal high motivation levels among LOTE students, with ideal L2 self, L2 learning experience, instrumentality–promotion, international posture, and cultural/community interest as significant predictors. Notably, L2 learning experience emerged as the most influential predictor across all LOTE groups, offering a promising avenue for educational advancements. It advocates a dynamic teaching approach, fostering positive environments, emphasizing practical benefits, integrating cultural elements, and addressing online classroom challenges. Optimistic recommendations include ongoing teacher development, collaboration among educators, and parental involvement for a vibrant and motivating educational experience. The study’s upbeat tone suggests potential expansion through increased sample sizes and incorporating a diverse array of less commonly taught languages (LCTLs).