(Will Jennings / James Horner)
The language is called Swahili.

Imba wimbo
Wa upepo
Wakati unajiwa na

Imba wimbo wa upepo
Wakati ndoto tamu

Lala mpaka usiku uisheni
Upepo wa usiku
Wimbo w___o na

Wimbo w___u inaendelea milele

ENGLISH TRANSLATION:

Sing a song
And for a moment
You will be visited by the wind

Sing a song
And for a moment
Dream sweetly of the wind

Sleep now until the night is dawn
The wind and the night song, they are there
However the song, my child, will go on forever.

See also:
JustSomeLyrics
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122.77
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Luke Hasta Siempre (live) Lyrics