Worked on refining Simplified Chinese translations for the Sandboxie Plus UI, focusing on maintenance operations, feature integration, template file editing, and certificate validation within the sandboxie-plus/Sandboxie repository. Applied internationalization and localization expertise to update translation files, ensuring that user-facing messages accurately reflected recent UI changes and workflows. Leveraged C++, TypeScript, and XML to align translations with the evolving application structure, which improved clarity and reduced user confusion. Collaborated with UI, QA, and documentation teams to ensure translation consistency, ultimately enhancing maintainability and reducing future localization effort as well as support load for Chinese-speaking users.