Rifffin developed the initial Indonesian localization for the KOReader User Guide in the koreader/koreaderhub.io.git repository, focusing on expanding documentation accessibility for Indonesian-speaking users. Leveraging PO files and the Weblate platform, Rifffin established a scalable localization workflow that supports future language additions. The work involved translating and tracking progress on documentation strings, ensuring a repeatable process for ongoing translation efforts. While no bugs were addressed during this period, the emphasis was on documentation, localization, and translation, laying a technical foundation that broadens the guide’s reach and usability for non-English speakers and supports KOReader’s internationalization strategy.