Galach

Galach is the universal lingua franca in the fictional "Dune" universe created by Frank Herbert, described in the "Terminology of the Imperium" appendix of "Dune" as "Hybrid Inglo-Slavic with strong traces of cultural-specialization terms adopted during the long chain of human migrations," indicating that the language is either a creole or mixed language likely descended from English and Russian. As the official language of the Imperium, Galach is used in official texts and in the Royal Court on Kaitain. Other languages are used at a local level and many people will only use Galach when they meet someone from another planet.

It also appears as the universal language in other novels by Herbert, such as "The Whipping Star" and "The Dosadi Experiment".