Karlo Kostanjevec contributed to the osmandapp/OsmAnd repository by advancing Croatian localization for points of interest, translating 44.5% of POI strings through Weblate. He focused on enhancing accessibility and usability for Croatian-speaking users by integrating XML-based translations and leveraging crowdsourced workflows. His work involved coordinating internationalization efforts, managing translation progress, and ensuring seamless integration with the existing codebase using Git. Although no bugs were fixed during this period, Karlo’s efforts laid the groundwork for full Croatian support, demonstrating proficiency in XML, localization, and translation processes while maintaining code stability and improving the platform’s international reach and user experience.