Contributed to the keycloak/keycloak repository by implementing Vietnamese localization across core user interfaces, including login, account, admin, and email sections. Leveraged YAML to seed initial translations from English and registered the new locale across all theme types, ensuring consistent internationalization and localization practices. Established a maintainable translation pipeline with future updates to be managed via Weblate, supporting ongoing improvements. The work addressed issue #47951 and was delivered through a collaborative, co-authored commit. This feature enables Vietnamese users to interact with the application in their native language, reducing onboarding friction and expanding accessibility, while demonstrating robust cross-theme integration skills.