<![CDATA[ABSTRACT Character education based on local culture faces challenges arising from globalization and tourism development, which affect the sustainability of local values and language. This study aims to analyze the condition of local cultural values and language, their implementation in education, and their contribution to students’ character development at SMA Negeri 1 Sembalun. This qualitative study employed a case study design. Participants included the principal, teachers, students, community leaders, and parents. Data were collected through observation, in-depth interviews, and documentation and analyzed using the interactive model of Miles, Huberman, and Saldaña. Data validity was established through source, technique, and time triangulation. The findings indicate that local cultural values and language are in a critical transition phase, characterized by the dominance of Indonesian in approximately 70% of students’ conversations and declining use of respectful greetings and traditional expressions, while mutual cooperation remains relatively strong. The implementation of cultural programs and the zero-waste program has not been systematically integrated into the curriculum due to limited resources, a dense curriculum, and low student interest. Their contribution to character development is primarily evident in mutual cooperation and responsibility, whereas politeness, respect, and cultural pride remain suboptimal. The novelty of this study lies in analyzing the interconnectedness of language shift, cultural values, character education, and tourism within the specific context of Sembalun. The study recommends integrating local wisdom into learning and strengthening collaboration among schools, families, and communities. ABSTRAK Pendidikan karakter berbasis budaya lokal menghadapi tantangan akibat globalisasi dan perkembangan pariwisata yang memengaruhi keberlangsungan nilai serta bahasa lokal. Penelitian ini bertujuan menganalisis kondisi nilai budaya dan bahasa lokal, implementasinya dalam pendidikan, serta kontribusinya terhadap pembentukan karakter siswa di SMA Negeri 1 Sembalun. Penelitian menggunakan pendekatan kualitatif dengan jenis studi kasus. Subjek penelitian meliputi kepala sekolah, guru, siswa, tokoh masyarakat, dan orang tua siswa. Data dikumpulkan melalui observasi, wawancara mendalam, dan dokumentasi, kemudian dianalisis menggunakan model interaktif Miles, Huberman, dan Saldaña. Keabsahan data dilakukan melalui triangulasi sumber, teknik, dan waktu. Hasil penelitian menunjukkan bahwa nilai budaya dan bahasa lokal berada dalam fase transisi kritis, ditandai dominasi bahasa Indonesia dalam sekitar 70% percakapan siswa, berkurangnya sapaan hormat dan ungkapan tradisional, sementara gotong royong masih relatif kuat. Implementasi program budaya dan zero waste belum terintegrasi secara sistematis dalam kurikulum karena keterbatasan sumber daya, kepadatan kurikulum, dan rendahnya minat siswa. Kontribusi terhadap karakter terutama terlihat pada gotong royong dan tanggung jawab, sedangkan kesantunan, penghormatan, dan kebanggaan budaya belum optimal. Kebaruan penelitian terletak pada analisis keterkaitan pergeseran bahasa, nilai budaya, pendidikan karakter, dan pariwisata dalam konteks Sembalun. Penelitian merekomendasikan integrasi kearifan lokal dalam pembelajaran dan penguatan kolaborasi sekolah, keluarga, serta masyarakat.]]>
