The Zaranite language is the primary form of language used for communication by the Zaranite civilization. Available as a course of study in the Federation, many Starfleet personnel have learned to be conversant in Zaranite.
In the year 2364, the service record of Captain Jean-Luc Picard indicated he had been instructed and had basic proficiency in Zaranite. (FASA RPG module: Star Trek: The Next Generation Officer's Manual)