Delivered a complete Catalan localization for HTTPS settings and status display in the th-ch/youtube-music repository, translating all 463 interface strings through Weblate to achieve full coverage. Focused on front end development and internationalization, the work involved integrating the new locale directly into the codebase using JSON, ensuring seamless language support for Catalan-speaking users. The process included establishing a translation workflow that supports governance and quality assurance, with clear documentation and commit attribution. This localization effort improved accessibility and user experience, reducing support friction and enabling smoother market expansion for the application’s Catalan audience without introducing new bugs.