Meaning of non-English singing from Diablo 2

Question

I've been playing Diablo 2 enough to memorize its soundtrack, and I've heard this distinct singing from it in more than one other composition. But it's not in any language I can recognize, and I don't even know how it's spelled. None of my friends that know foreign languages could identify the lyrics, but given the genre it's probably not French or Spanish. The tracks I know of that contain the singing I'm interested in are:

• Diablo II − #09 Sanctuary @ 1:20
• Serial Experiments Lain − #10 Cloudy with Occasional Rain @ 0:26

I'd like to know what these mean and if possible where these voice samples come from.

Answer 1

Well, luckily, someone posted an explanation in the comments section of the video "Serial Experiments Lain - Cloudy with Occasional Rain," so go visit it. - https://youtu.be/1TunrW7dRr0

"... the vocal is a prayer to the Hindu goddess Lakshmi. "Prasanna Vadanaam. Saubhaagyadaam Bhaagyadaam. Hastaabhyaam Abhayapradaam. Maniganai naa naavidhai Bhuushhitaam".

English: "I salute the Goddess, who is of smiling face, bestow-er of all fortunes whose hands are ready to rescue anyone from fear who is adorned by various ornaments with precious stones, who showers boons fulfilling the ambitions of Her devotees."

Answer 2

The wikipedia page for the Diablo II soundtrack indicates that the voices come from "Heart of Asia, Heart of Africa and Symphony of Voices" by Spectrasonics

A little more looking finds:

• Heart of Asia
• Heart of Africa 1
• Heart of Africa 2
• Symphony of Voices

Those pages list some of the sample sources, although to match specifically what is used in those tracks would be a bigger effort.