Indo-European language, Indo-Hittite, Indo-European - the family of languages that by 1000 BC were spoken throughout Europe and in parts of southwestern and southern Asia

Slavic, Slavic language, Slavonic, Slavonic language - a branch of the Indo European family of language

Baltic language, Baltic - a branch of the Indo-European family of languages related to the Slavonic languages; Baltic languages have preserved many archaic features that are believed to have existed in Proto-Indo European