During November 2025, László Pusztai contributed to the faker-js/faker repository by implementing Hungarian localization for location data, enabling the generation of realistic Hungarian city names, street addresses, continents, countries, and directional terms. He approached this by preparing extensive locale-specific data files, focusing on data management and ensuring high fidelity for localization testing and internationalization scenarios. Working primarily with TypeScript, László enhanced the repository’s ability to support Hungarian applications and improved QA coverage for locale-specific features. His work laid the foundation for future expansion to additional locales, demonstrating depth in localization engineering and attention to test-data realism and product readiness.