Worked on the th-ch/youtube-music repository to deliver comprehensive Persian localization, focusing on both initial translation and ongoing UI improvements. Leveraged Weblate for translation management and integrated JSON-based workflows to achieve near-complete coverage of Persian strings, including contextual phrases for music playback notifications. Prioritized internationalization best practices by documenting translation status and ensuring traceability for future contributions. The work enhanced accessibility and user experience for Persian-speaking audiences, supporting broader market reach. Demonstrated strong skills in internationalization, localization, and translation management, while validating a repeatable pipeline for future multilingual support and seamless integration of new language features into the product.