Russian

Russian is an Indo-European Eastern-Slavic language that originated in Kievan Rus, on Earth. It was banned by the United Powers League in the 23rd century when English was imposed as the common language. At least some elements of the language survived to be used in the Koprulu Sector two centuries afterwards, and were used in advertisements of the Augustgrad establishment Beta Bank. In addition, some members of the United Earth Directorate, such as Alexei Stukov, still were able to speak the language and identified as Russian.