Developing an Android-Based Trilingual Dictionary (Osing– Indonesian–English): Compilation and Digitalization of the First 500 Osing Words

The Osing language holds significant cultural value as the local language of Banyuwangi, East Java. However, the threat of language decline has become a significant concern, as younger generations increasingly use national or foreign languages, gradually replacing local languages in daily communication. This situation is further complicated by the fact that many members of the Osing community are not fluent in either Indonesian or English. The preservation of the Osing language is also hindered by the limited availability of learning resources, which are primarily limited to bilingual dictionaries and basic translation websites that lack comprehensive features and sufficient vocabulary coverage. This research aimed to develop an Android-based trilingual dictionary (Osing–Indonesian–English) to support the preservation of the Osing language while also serving as a tool to assist educational and tourism sectors. The goal was to assist various users, including students, Osing speakers, and visitors. Using a Design and Development Research (DDR) approach, the study adopted the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). An analysis of the challenges and needs was conducted through interviews, and the data were collected from observations and written resources. The implementation was then conducted by field testing with users. The application incorporated 500 Osing headwords and featured example sentences, audio pronunciations, images, and an interface designed for ease of use. The developed application, named Osing Dictionary, received an overall score of 3.69 out of 4 on the evaluation scale. The product successfully adhered to general principles for developing electronic dictionaries, including user-centered design, lexicographic theory, computational linguistics, interactivity, multimedia integration, and accessibility and inclusivity. These results were supported by positive user feedback, with many respondents recommending the expansion of the application’s vocabulary. These findings make a meaningful contribution to both the theoretical and practical aspects of language preservation. The study demonstrates how digital tools can bridge traditional knowledge systems with modern communication needs. The developed application highlights the potential of mobile technology in promoting endangered languages, while suggesting future improvements, such as adding more vocabulary entries and enabling offline functionality.