Contributed to the jellyfin/jellyfin open source project by delivering a comprehensive Portuguese localization feature, enhancing accessibility for Portuguese-speaking users. Utilized JavaScript and the Weblate translation workflow to implement and commit a patch that translated core user interface strings. Focused on expanding the project's internationalization efforts, the work involved establishing and refining a sustainable translation process for ongoing localization needs. The contribution addressed the need for broader language support within the application, ensuring that Portuguese users could interact with the software more effectively. This effort demonstrated proficiency in localization, translation, and collaborative open source development within a JavaScript-based environment.