Worked on Lithuanian localization and accessibility enhancements for the th-ch/youtube-music repository, focusing on expanding usability for Lithuanian-speaking users. Delivered translations for key user interface elements, such as custom window title prompts and status display types, using JSON to manage language resources. Progress was tracked through Weblate, reaching 78.4% completion and laying the groundwork for full localization coverage. The approach emphasized non-breaking changes and prioritized UI/UX improvements, ensuring a smooth integration with existing front end development workflows. This work supported a localization-first strategy, preparing the project for upcoming QA and release phases while fostering broader audience engagement and accessibility.