During December 2025, Krisztián worked on the koreader/koreaderhub.io.git repository to deliver Hungarian localization for the KOReader User Guide. Focusing on i18n and translation, Krisztián utilized PO files and the Weblate platform to add and update Hungarian strings, reaching 22.7% localization coverage. The work included strengthening the translation workflow and improving documentation to support ongoing multilingual expansion. By ensuring clear commit traceability and integrating translation updates directly into the repository, Krisztián enabled scalable language support. The project enhanced accessibility for Hungarian-speaking users and demonstrated a methodical approach to progressive localization, though the scope was limited to one feature.