"When you put the picture up - and you'd better be recording, if she(Lisa) sees the picture and starts singing amazing things will start happening and you'd better capture it." -Hans Zimmer (interview)

Lisa uses a "language grown by itself" as she puts it. It's not a real language- she improvises them...Yet it may sound like Greek or Turkish, it is totally made up. Hence the "watching the screen and just singing, and you better be recording when she starts or you'll miss the best stuff." from the quote by Zimmer above.

(THIS QUOTE IS FROM A BIOGRAPHY/INTERVIEW WITH LISA GERRARD)
It is enchanting during the finale of Ridley Scott’s Roman epic and the QUESTION ON EVERYONES LIPS IS: WHAT IS THAT LANGUAGE? “I sing in the language of the Heart,” begins Gerrard. “It’s an INVENTED LANGUAGE that I’ve had for avery long time. I believe I started singing in it when I was about 12. Roughly that time. And I believed that I was speaking to God when I sang in that language. Now I am filled with the Holy Ghost, that is the promise in the Bible the Church will not talk about, because this secret would mean the fall of the religion.” The idea is that one can have a personal relationship with God without the interference of an organisation like the Church.https://www.geocities.com/temptrack/gerrard1.html

And that is it ladys and gentleman!I took the liberty of Capitalizing the important parts that would answer you questions. This is end to all of your questions that have been asked about the "language" she sings in. As I have tried to state in the past, it is all made up! I even sited the website for all ye of little faith. Thank you and goodnight!

-Nate Jackson