Ruthenian language
An attested reference to Romanian comes from a Latin title of an oath made in 1485 by the Moldavian Prince Stephen the Great to the Polish King Casimir, in which it is reported that ""Haec Inscriptio ex Valachico in Latinam versa est sed Rex Ruthenica Lingua scriptam accepta"—This Inscription was translated from Valachian (Romanian) into Latin, but the King has received it written in the Ruthenian language (Slavic)".