The lyrics are from an invented language based on sounds (wordpainting).
For Wordpainting, look to wikipedia:
Word painting - Wikipedia
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Wikipedia
Word painting (also known as tone painting or text painting) is the musical technique of composing music that reflects the literal meaning of a song...
Oh ma la oh oh me giova oh
Pe dolae già po va po
E sha me co oh me gioma ah
Pæ dü le pa tus dac
E la fongo oh te de van
Pe a su mon ah tu na
Oh de salai tu ghe
Mani tünai oh ye
Oh nià pa eh eh padè pa nar
Oh da ne pe se do oh
E cha la co na cha me pa de
Sar male giac ef ma
E ma pa
Co oh te do la ah
Cas do le pa ta pa
Italian Song was written by Vangelis.