I was doing the quest in which you speak to the greybeards for the first time and, speaking about the dragons, Arngeir says that language is intrinsic to dragons nature.
This is very similar to the incipit of John's Gospel, where he says: "In the beginning was the Word, and the Word was with God, and the Word was God. --- And the Word was made flesh, and dwelt among us" And Arngeir says that the Voice is a gift of Kynareth, a divine, and the dragons are one with the voice.
Could it possibly be a nod to Christian religion then?