Fye-chan's right ^^ Kajiura has used this made-up language (sometimes sound to me like italian, latin and japanese mixed together ^^u) in other songs composed by her, for example, in .hack//SIGN or Xenosaga Episode II). If you take a look at the booklet of the first Tsubasa soundtrack, it only includes the lyrics for BLAZE (TV size), you are my love, tsubasa and Loop (TV size), which means there are no lyrics. The only thing you could find out there are phonetic transcriptions of them, but they can't claim to be the "official" lyrics simply because they doesn't exist.