Theory
Thracians/Dacians were I2a/R1a people.
There are various hypothesis however it is logical that I2a/R1a people have similar languages to some extent.
Thracian/Dacian as Illyrian has same or similar words as Balto Slavic languages.
There is one of theory that Thracian is Baltic language, and that theory has basis.
For example:
balios (Thracian), baltus (Luthuanian), belo (Serbian), white (English)
zilma (Thracian), zelme (Latvian), zelen (Serbian), greens (English)
udra (Thracian), ūdra (Lithanian), vidra (Serbian), otter (English)
gin (Thracian), gnins (Latvian), gnjiti (Serbian), spoil, decay (English)
brink (Thracian), brinkti (Lithuanian), breknuti (Serbian), swell (English)
kiri (Thracian), giria, gire (Lithuanian), gora (Serbian), mountain forest (English)
saltas, zaldas (Thracian), zelt (Latvian), zlato (Serbian), gold (English)
zum, zuml (Thracian), zmaj, zmija (Serbian), dragon, snake (English)
laza (Thracian), laz, lazina (Serbian), clearing in forest (English)
Etc.
There are a lot of authors who claim that Thracian is Balto Slavic language, and it is not new, for example several authors and books:
Neroznak, V. Paleo-Balkan Languages. Moscow, 1978.
Fasmer, M. Etymological Dictionary of the Russian Language. Moscow, 1986.
Duridanov, I. Ezikyt na trakite, Sofia, 1976.
If someone sees geography he identifies that Balto Slavic people and Thracians easily can be linked geneticaly and linguistic:
Balto-Slavic people and Thracians are R1a/I2a people, and they spoke languages which belong Balto-Slavic group.
It is so logical.
It is very difficult that Illyrians were not R1a/I2a people, so and Illyrians spoke Balto Slavic. But here is topic: Thracians.
But Macedonians maybe, it is possible that Macedonians were mostly E-V13/J2 people.
Today's Serbs, Bulgarians, Romanians, etc. are partly descendants of Thracians. Romanians are romanized, but old language Dacian was one of Thracian branch and Balto Slavic too.
When Slavic people enter in today's Serbia, Bulgaria etc. the local residents are already talking a similar language. They were similar origin, similar haplogroups and they had similar language. We will not speculate about numerous impact Slavs but it is possible that was about 5% Slavs, and all others were local residents (Thracians etc.).
When asked where the Thracians lost answer is: nowhere, they remain where they were (today's Serbia, Bulgaria, Romania etc.).
It is topic to provoke discussion. The theory is very logical according to genetic, liguistic and hystoric sources.
Thracians/Dacians were I2a/R1a people.
There are various hypothesis however it is logical that I2a/R1a people have similar languages to some extent.
Thracian/Dacian as Illyrian has same or similar words as Balto Slavic languages.
There is one of theory that Thracian is Baltic language, and that theory has basis.
For example:
balios (Thracian), baltus (Luthuanian), belo (Serbian), white (English)
zilma (Thracian), zelme (Latvian), zelen (Serbian), greens (English)
udra (Thracian), ūdra (Lithanian), vidra (Serbian), otter (English)
gin (Thracian), gnins (Latvian), gnjiti (Serbian), spoil, decay (English)
brink (Thracian), brinkti (Lithuanian), breknuti (Serbian), swell (English)
kiri (Thracian), giria, gire (Lithuanian), gora (Serbian), mountain forest (English)
saltas, zaldas (Thracian), zelt (Latvian), zlato (Serbian), gold (English)
zum, zuml (Thracian), zmaj, zmija (Serbian), dragon, snake (English)
laza (Thracian), laz, lazina (Serbian), clearing in forest (English)
Etc.
There are a lot of authors who claim that Thracian is Balto Slavic language, and it is not new, for example several authors and books:
Neroznak, V. Paleo-Balkan Languages. Moscow, 1978.
Fasmer, M. Etymological Dictionary of the Russian Language. Moscow, 1986.
Duridanov, I. Ezikyt na trakite, Sofia, 1976.
If someone sees geography he identifies that Balto Slavic people and Thracians easily can be linked geneticaly and linguistic:
Balto-Slavic people and Thracians are R1a/I2a people, and they spoke languages which belong Balto-Slavic group.
It is so logical.
It is very difficult that Illyrians were not R1a/I2a people, so and Illyrians spoke Balto Slavic. But here is topic: Thracians.
But Macedonians maybe, it is possible that Macedonians were mostly E-V13/J2 people.
Today's Serbs, Bulgarians, Romanians, etc. are partly descendants of Thracians. Romanians are romanized, but old language Dacian was one of Thracian branch and Balto Slavic too.
When Slavic people enter in today's Serbia, Bulgaria etc. the local residents are already talking a similar language. They were similar origin, similar haplogroups and they had similar language. We will not speculate about numerous impact Slavs but it is possible that was about 5% Slavs, and all others were local residents (Thracians etc.).
When asked where the Thracians lost answer is: nowhere, they remain where they were (today's Serbia, Bulgaria, Romania etc.).
It is topic to provoke discussion. The theory is very logical according to genetic, liguistic and hystoric sources.