<![CDATA[This research aims to describe the internalization of Tri Gatra Bangun Bahasa in an effort to strengthen the spirit of nationalism at the Islamic International School Pesantren Sabilil Muttaqien (IIS PSM) Kediri. This research is motivated by the challenges faced by international schools in maintaining the national identity of students amidst the currents of globalization and the dominance of foreign cultures. The Tri Gatra Bangun Bahasa concept, which includes prioritizing the Indonesian language, preserving regional languages, and mastering foreign languages, becomes an important strategy in strengthening students' national character. This research uses a qualitative descriptive method with data collection techniques thru interviews, observations, and documentation. The research results show that the internalization of Tri Gatra Bangun Bahasa is carried out thru the Gebyar Bulan Bahasa activities, which include Javanese poetry competitions, Indonesian poetry, and English storytelling. These activities not only serve as a medium for developing language skills but also as a means of instilling nationalism, preserving local culture, and strengthening national identity in the environment of Islamic-based international schools. This research shows that the integration of local languages, Indonesian, and foreign languages within school culture can be an effective strategy in strengthening students' sense of nationalism in the era of globalization.]]>
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