Developed and delivered a Korean Localization Language Pack for the SonarSource/sonar-update-center-properties repository, enabling full Korean language support within the application interface. This work involved implementing comprehensive translations and making targeted UI adjustments to ensure seamless integration of Korean text, thereby improving accessibility for Korean-speaking users and supporting broader market adoption. The project demonstrated proficiency in Java, internationalization, and localization practices, with disciplined, auditable change management through clear commit tracking. By laying a robust foundation for future locale expansion, the work addressed both technical and user experience challenges, focusing on accessibility and inclusivity without introducing new bugs during the development period.