In this talk, the speaker represents the Open Source Business Alliance (OSPR) and discusses the challenges and insights they have gained while promoting and using open source software in Germany. They highlight the need to address issues related to open source licenses and contract management in the public sector. The speaker emphasizes the importance of understanding the licenses and compatibility of different components used in open source projects. They also discuss the need for software bill of materials (SBOM) and the role it plays in ensuring license compliance and security. The speaker concludes by offering suggestions for developers to improve the situation, such as checking compatibility of licenses, building SBOMs, and avoiding complex or exotic licenses. They also mention the European Union Public License (EUPL) as an option for licensing in different European languages.