This study investigates both teachers’ and students’ belief in language education at Madrasah Mu’allimin Muhammadiyah Yogyakarta in the academic year of 2019/ 2020. Semi-structured interviews were conducted with five teachers and five students as the research participants. Interview results were analyzed though qualitative data analysist. The finding showed that generally their belief on language education was influenced by religious values of Islam. It was the core value of their language education. All respondents showed their social awareness of the importance of language usage and its mastery as part of religious duty.