Worked on the th-ch/youtube-music repository to deliver full Brazilian Portuguese localization for the user interface, translating 457 strings to achieve complete coverage. Leveraged JSON for translation files and integrated Weblate to streamline the localization workflow, ensuring translation hygiene and traceability throughout the process. Focused on internationalization (i18n) best practices, the work established a scalable pipeline for future translations and improved accessibility for Portuguese-speaking users in Brazil. No bugs were addressed during this period, with efforts concentrated on expanding regional engagement and documenting translation status through commit messaging and Weblate integration, resulting in a robust and maintainable localization foundation.