The fact that their language is based on Latin makes it pretty obvious.
Roman Dacia existed, and the did introduce Vulgar Latin to the area but for only 100 years. The area was governed far longer by Goths Huns Gepids, Avars, Bulgars,Pechenegs,Cumans, then fell under the influence of Hungary.
When my wife speaks her native Spanish, I hear dialectic Latin. When my best friend’s wife speaks her native Romanian, its sounds like Hungarian to me, not Romance at all.