In the final scene of last night's episode, as Arya sets sail for Braavos, there is a version of the GOT theme playing with a beautiful choral arrangement. Is this version of the theme available on any of the official soundtracks? Also, do you guys know what language it is being sung in and what the lyrics are?
EDIT: I answered my own question. It is "The Children" off Season 4 soundtrack. But my other questions about it are still in play.