During November 2025, Hieu Do focused on enhancing the ZoeyVid/NPMplus repository by implementing Vietnamese language support across the application. He added new Vietnamese locale files and updated the localization logic using TypeScript and JSON, ensuring that the user interface is accessible to Vietnamese-speaking users. His work centered on front end development and internationalization, expanding the existing i18n framework to cover core components. Although no bugs were fixed during this period, Hieu established a modular localization architecture that supports scalable translation workflows, laying a solid foundation for future multilingual expansion and improving the application's accessibility for a broader audience.