The objective of the current study was to investigate undergraduate students’ motivation in learning three East Asian languages (Chinese, Japanese, and Korean), with intended effort used as a measure of motivation, based on Dörnyei’s L2MSS theory (2005) and five other predictors. The study’s participants were 95 undergraduate students, recruited by convenient random sampling on a voluntary basis, eight of whom volunteered to participate in interviews. Descriptive data and Pearson correlations were used to identify language learning motivations and the relationship between predictors and the intended effort, while a qualitative content analysis was used to support quantitative findings. The results revealed that the participants showed high levels of motivation in learning East Asian languages. A strong linear relationship was found between L2 learning experience, with all languages studied, and the ideal L2 self component. Moreover, the factor of intended effort had a positive relationship with instrumentality-promotion (r = .651, p = .000), international posture (r = .275, p = .003), and cultural/community interest (r = .426, p = .000) in Chinese learners, cultural/community interest (r = .433, p = .015) in Japanese learners, and international posture (r = .446, p = .015) in Korean learners. Nonetheless, instrumentality-prevention and intended effort were negatively related in Japanese learners (r = -.420, p = .019). The study recommends a comprehensive study be undertaken to investigate the role of L2 learning experience and its importance in L2 learning.