2024 e Development of Kalagan and Isamal Linguistics: An Archival Research Jessa Jane Iglesia, Sajed S. Ingilan, & Saeed Al Qumairi Date received: February 20, 2024 Date revised: June 2, 2024 Date accepted: August 6, 2024 Similarity index: 0% Abstract e Philippines is a linguistically rich archipelago, holding about 3% of the world’s languages. However, it is also considered a “language hotspot” due to the rapid disappearance of languages in the area. Amongst these languages are Kalagan and Isamal, with their language vitality classified as endangered. With this in mind, this paper looks into the status of Kalagan and Isamal linguistics. It examines the progress made from 1885 to the present day. It documents scholarly articles published by the Summer Institute of Linguistics and other academic journals, focusing on advancements in lexicography, phonology, morphology and syntax, grammar, discourse, and literacy materials within Kalagan and Isamal linguistics. e findings reveal that while significant research has been conducted on Kalagan linguistics, the trend is the opposite for Isamal linguistics. e paper concludes by highlighting the implications of the study for the broader field of Philippine linguistics while providing directions for further research. Keywords: Kalagan linguistics, Isamal linguistics, Philippine Linguistics Author Information: 1 Jessa Jane Iglesia jjiglesia02048@usep.edu.ph orcid.org/0009-0009-6724-2884 2 Sajed S. Ingilan ingilan.sajed@usep.edu.ph orcid.org/0000-0002-4466-2028 3 Saeed Al Qumairi ssqumairi@gmail.com orcid.org/0000-0002-4034-9640 1 Graduate Student Graduate School of Arts and Sciences, University of Southeastern Philippines Davao City, Philippines 2 Associate Professor College of Arts and Sciences, University of Southeastern Philippines Davao City, Philippines 3 Assistant Professor University of Nizwa Birkat Al Mawz, Oman https://doi.org/10.53899/spjrd.v29i2.429 Southeastern Philippines Journal of Research and Development, Vol. 29, No. 2 191