Worked on the HeyPuter/puter repository to deliver complete Danish localization by updating the da.js translation file and adding missing Danish translations across various UI elements and messages. Applied internationalization and localization best practices to standardize the translation structure and workflow, ensuring the codebase is ready for future language support. Utilized JavaScript and JSON for translation management, carefully validating changes through existing QA processes to maintain accuracy and minimize translation-related issues. This work improved accessibility and user experience for Danish-speaking users, supporting smoother onboarding and use in the Danish market while laying a foundation for ongoing internationalization efforts.