Nelson enhanced localization support for the mdn/data repository by updating Traditional Chinese (zh-TW) translations within the css.json file. He focused on improving the user experience for zh-TW users by aligning translation updates with the established localization workflow and incorporating code review feedback from collaborators. Nelson utilized JSON for structured data handling and demonstrated skills in localization and translation processes. Although no bugs were fixed during this period, his disciplined approach emphasized code quality and maintainability. The work laid the foundation for broader locale support, ensuring future updates to localization could be integrated smoothly and efficiently within the existing workflow.