Worked on the lfnovo/open-notebook repository to deliver full Polish (pl-PL) localization across the front-end user interface. This involved translating all UI sections, updating the language toggle to support the new locale, and implementing locale-aware date formatting to ensure accurate display for Polish users. The integration was completed using TypeScript and front end development best practices, with a focus on cleanly extending the existing internationalization framework. No major bugs were addressed during this period, as the primary effort centered on feature development and seamless localization. The work enhances accessibility and broadens the platform’s usability for Polish-speaking audiences.