Contributed to the faker-js/faker repository by expanding Turkish localization data, specifically enhancing the list of Turkish last names to improve the realism and authenticity of generated sample data for Turkish users. Focused on internationalization and localization best practices, the work involved careful data maintenance and the use of semantic commits to ensure traceability and maintain high data quality. Leveraged TypeScript and JavaScript ecosystem tooling to implement these changes, supporting the product’s broader internationalization strategy. The update addressed the need for more comprehensive Turkish locale support, enabling more accurate and culturally relevant test data generation without introducing new bugs.