During November 2024, this developer contributed to the jellyfin/jellyfin repository by implementing Catalan localization support for the Jellyfin UI, enabling Catalan-speaking users to interact with the interface in their native language. The work involved creating and integrating JSON-based translation files and establishing a Weblate-driven workflow to streamline future localization efforts. By focusing on internationalization and translation processes, the developer improved accessibility and laid the groundwork for supporting additional languages. Their approach emphasized open-source collaboration, Git-based version control, and UI localization, resulting in an expanded user base and enhanced user experience for Catalan speakers without introducing new bug fixes.