Editing Thracian language (section)

== Classification ==
{{Main|Classification of Thracian}}

Due to a paucity of evidence required to establish a linguistic connection, the Thracian language, in modern linguistic textbooks, is usually treated either as its own branch of Indo-European,<ref name="Fortson 2004 404"/> or is grouped with Dacian, together forming a Daco-Thracian branch of IE. Older textbooks often grouped it also with [[Illyrian languages|Illyrian]] or [[Phrygian language|Phrygian]]. The belief that Thracian was close to Phrygian is no longer popular and has mostly been discarded.<ref>See C. Brixhe – Ancient languages of Asia Minor, Cambridge University Press, 2008 <br />''We will dismiss, at least temporarily, the idea of a Thraco-Phrygian unity. Thraco-Dacian (or Thracian and Daco-Mysian) seems to belong to the eastern (satem) group of Indo-European languages and its (their) phonetic system is far less conservative than that of Phrygian (see Brixhe and Panayotou 1994, §§&nbsp;3ff.)''</ref>

There is a fringe belief<ref name=HCHL2018>{{cite book |last=Klein et al. edd. |first=J. |year=2018 |title=Handbook of Comparative and Historical Linguistics |chapter=81 'The Phonology of Slavic' by Daniel Petit |page=1966}}</ref><ref name=Arumaa1964>{{cite book |last=Arumaa |first=P. |year=1966 |title=Urslavische Grammatik: Einführung in Das Vergleichende Studium Der Slavischen Sprachen, Band I: Einleitung • Lautlehre |pages=18–23}}</ref> that Thraco-Dacian forms a branch of Indo-European along with [[Baltic languages|Baltic]],<ref>Holst (2009):66.</ref> but a Balto-Slavic linguistic unity is so overwhelmingly accepted by the Indo-European linguistic community that this hypothesis does not pass muster.