Johan contributed to the koreader/koreaderhub.io.git repository by localizing the KOReader User Guide, focusing on expanding accessibility for Chinese-speaking users. He delivered a complete Simplified Chinese translation and initiated Traditional Chinese coverage, leveraging PO files and the Weblate platform to streamline the translation workflow. His work included updating translation metadata and integrating provenance tracking, ensuring future localization efforts remain efficient and traceable. Johan’s technical approach emphasized documentation quality and workflow automation rather than bug fixes, resulting in a robust foundation for ongoing translation. His efforts strengthened the project’s localization infrastructure and improved documentation accessibility for a broader audience.