Official sources place Trajan's ancestors in Tuder, Umbria, Italy. Maybe one day we'll find out what he meant by "I'm coming home".
Personally I'm inclined to highlight the unity of Old Europe as a foundation for the Latin language. The Greeks played many cards and influenced deeply both the bottom half of today's Italy and the West shore of the Black Sea since thousands of years.
As for the Illyrians, well they're sort of cousins with the Dacians. There are extraordinary resemblance between modern Albanian and Romanian, to say the least.
I enjoyed you last remark. Let me try to pay it back by adding a geographic curiosity: Carpathians Mountains are the most recent mountains of Europe, while Măcin Mountains (Dobrogea) are the oldest, you can barely call them mountains now. Maybe something happened in that area long ago, like a cataclysm.
In conclusion, I really doubt the Romans thought Latin to the Dacians. Sadly, because of the many troll movements it's almost impossible to talk about this without sounding like a crazy person. On second thought, I'm glad it was mocked first, now you really know there's something about it that's true.
