Daco-Thracian

The linguistic classification of the ancient Thracian language has long been a matter of contention and uncertainty, and there are widely varying hypotheses regarding its position among other Paleo-Balkan languages. It is not contested, however, that the Thracian languages were Indo-European languages which had acquired satem characteristics by the time they are attested.

The longer Thracian inscriptions that are known (if they are indeed examples of Thracian sentences and phrases, which has not been determined) are not apparently close to Baltic, Slavic, Albanian, or any other known language, and they have not been satisfactorily deciphered aside from perhaps a few words.

A Daco-Thracian (or Thraco-Dacian) grouping with Dacian was widely held until the 1950s, but is untenable (according to J. P. Mallory) in light of toponymic evidence: only a percent of place names north of the Danube betray "pan-Thracian" roots.

In the 1950s, the Bulgarian linguist Vladimir I. Georgiev published his work which argued that Dacian and Albanian should be assigned to a language branch termed Daco-Mysian, Mysian (the term Mysian derives from the Daco-Thracian tribe known as the Moesi) being thought of as a transitional language between Dacian and Thracian. Georgiev argued that Dacian and Thracian are different languages, with different phonetic systems, his idea being supported by the placenames, which end in -dava in Dacian and Mysian, as opposed to -para, in Thracian placenames. A series of authors favors Georgiev's view. Nevertheless, Polome hesitates to accept it. Crossland considers this seems to be a divergence of a Thraco-Dacian language into northern and southern groups of dialects, not as different as to rank as separate languages .

Thraco-Illyrian is a hypothesis that the Thraco-Dacian and Illyrian languages comprise a distinct branch of Indo-European. Thraco-Illyrian is also used as a term merely implying a Thracian-Illyrian interference, mixture or sprachbund, or as a shorthand way of saying that it is not determined whether a subject is to be considered as pertaining to Thracian or Illyrian. Downgraded to a geo-linguistic concept, these languages are referred to as Paleo-Balkan.

...
Wikipedia