It is also argued that the Dacian language may form the substratum of Common Romanian, which developed from the Vulgar Latin spoken in the Balkans north of the Jirecek line, which roughly divides Latin influence from Greek influence. About 300 words in Balkan Romance languages, Daco-Romanian, Aromanian, Megleno-Romanian, Istro-Romanian, may derive from Dacian, and many of these show a satem-reflex. Whether Dacian forms the substratum of Common Romanian is disputed, yet this theory does not rely only on the Romanisation having occurred in Roman Dacia, as Dacian was also spoken in Moesia and northern Dardania.Moesia was conquered by the Romans more than a century before Dacia, and its Latinity is confirmed by Christian sources.