Guulinusui contributed to the koreader/koreaderhub.io.git repository by initiating the German localization of the KOReader User Guide, translating 304 out of 1,947 strings using the PO language format and Weblate platform. Their work focused on establishing a robust i18n and localization workflow, emphasizing translation accuracy and accessibility improvements for German-speaking users. Guulinusui also reviewed and corrected previously translated strings to enhance usability, ensuring a consistent user experience. Although no bugs were fixed during this period, the groundwork laid in this initial phase supports future internationalization milestones and sets a clear path for expanding KOReader’s reach in German-speaking communities.