During December 2024, Mykyta Derevianko focused on improving localization reliability for Ukrainian users in the HeyPuter/puter repository. He addressed a persistent bug in the ua.js translation file by correcting string literals and syntax errors, which previously caused UI display issues and hindered the user experience for Ukrainian speakers. Using JavaScript and applying best practices in internationalization and localization, Mykyta ensured that the interface rendered correctly and reduced the risk of future translation-related bugs. His work enhanced the maintainability of the i18n codebase, providing a cleaner foundation for ongoing localization efforts and supporting a smoother experience for end users.