Worked on the KlubJagiellonski/pola-backend repository to deliver a localization enhancement focused on Polish-speaking users. Developed and implemented a new YAML configuration file that sets GitHub Copilot’s default prompts to respond in Polish, aligning with the project’s localization strategy. Restricted access to this configuration to maintainers, ensuring proper governance and minimizing the risk of misconfiguration. Leveraged skills in AI configuration and GitHub Actions to integrate the feature seamlessly into the existing backend workflow. This work improved the backend’s readiness for localization and enhanced the user experience for Polish-speaking maintainers, supporting broader engagement in the Polish market.