The low learning motivation in students studying Indonesian language is often encountered in a school using international curriculum. This was also found at XYZ school, where the issue encountered is of a particular one. The Indonesian language subject has led students to experience stress, moving out to language B course, and even moving into a new school. This is a case-study research involving 3 respondents and 7 participants. This case-study research was conducted during the Covid 19 pandemic; thus, all data collection was done online. The techniques used to collect data include open questionnaires, in-depth interviews, observations, and document reviews. Data validity was tested through data triangulation. The results showed that internal factors, namely student’s perspective on Indonesian language and external factors which are family background, curriculum policies and teacher quality greatly affect to students motivation. The role of parents, teachers, as well as curriculum policies are crucial to increase the students’ learning motivation in studying Indonesian language. / The low learning motivation in students studying Indonesian language is often encountered in a school using international curriculum. This was also found at XYZ school, where the issue encountered is of a particular one. The Indonesian language subject has led students to experience stress, moving out to language B course, and even moving into a new school. This is a case-study research involving 3 respondents and 7 participants. This case-study research was conducted during the Covid 19 pandemic; thus, all data collection was done online. The techniques used to collect data include open questionnaires, in-depth interviews, observations, and document reviews. Data validity was tested through data triangulation. The results showed that internal factors, namely student's perspective on Indonesian language and external factors which are family background, curriculum policies and teacher quality greatly affect to students motivation. The role of parents, teachers, as well as curriculum policies are crucial to increase the students' learning motivation in studying Indonesian language.