OpenLogos is a powerful machine translation system originally developed by Logos Corporation, and its development and maintenance have been continued by DFKI (German Research Center for Artificial Intelligence). The system primarily focuses on translating between several European languages with an emphasis on quality and fluency that suits professional and academic needs.OpenLogos employs rule-based translation methods, which involve deep linguistic analysis and synthesis processes, distinguishing it from the statistical or neural network approaches commonly found in other translation tools. This approach allows for the consideration of complex grammatical rules and the semantic nuances of source and target languages, often resulting in more accurate and context-appropriate translations.As an open-source project hosted at http://logos-os.dfki.de/, OpenLogos encourages contributions from developers and linguists around the world, fostering a collaborative environment to enhance its capabilities and adapt it to more languages and specialized fields. The platform serves as a valuable resource for researchers, developers, and language professionals seeking a robust tool for complex translation tasks.