ENDANGERED LANGUAGES IN BORNEO: A SYSTEMATIC REVIEW OF CLASSIFICATIONS AND PRESERVATION STRATEGIES

Abstract

Languages across Borneo, including Belait, Penan, Bidayuh, and minority Narum variants in the Baram-Tinjar region, are rapidly endangered due to language shift, limited intergenerational transmission, and the dominance of regional languages. Despite Borneo's linguistic diversity and significance to Austronesian classification, a comprehensive systematic synthesis of language classifications and preservation efforts remains limited. This study addresses the research gap by systematically reviewing Scopus-indexed literature on language classification and preservation strategies for endangered languages in Borneo. A qualitative systematic review was conducted following PRISMA guidelines, with a Boolean search applied across the Scopus database. Inclusion criteria encompassed studies addressing language classification (phonological features, sociolinguistic vitality frameworks, linguistic relationships) and community-based preservation initiatives published between 2000 and 2026. From 509 initial records, 11 studies met all inclusion criteria. They were subjected to a thematic synthesis organised around two research questions: (RQ1) how endangered languages in Borneo have been classified using comparative-historical, lexicostatistical, or typological methodologies; and (RQ2) what preservation strategies have been employed and what factors determine their effectiveness. Findings reveal that classification in the reviewed corpus draws on descriptive linguistics, orthography development, UNESCO vitality frameworks, and social network analysis, with the outcomes emerging from studies triangulating structural, functional, and social evidence. Documentation, community-based revitalisation, and technological interventions constitute the preservation practice, with community ownership consistently distinguishing sustainable from short-lived initiatives. Regional disparities are evident, with Sarawak exhibiting stronger documentation infrastructure than Brunei, Sabah, and Kalimantan. This review underscores the critical need for integrated, coordinated documentation efforts and evidence-based language policies across Borneo's diverse political contexts.