"Circle of Life" from The Lion King - words at beginning?

At the beginning of “The Circle of Life” there are words sang/chanted in another language, does anyone know what they mean? What is the language?

Nants ingonyama bagithi Baba [Here comes a lion, Father]
Sithi uhm ingonyama [Oh yes, it’s a lion]

Nants ingonyama bagithi baba
Sithi uhhmm ingonyama
Ingonyama

Siyo Nqoba [We’re going to conquer]
Ingonyama
Ingonyama nengw’ enamabala [A lion and a leopard come to this open place]

[Chant repeats]

Source: The Lion King WWW Archive: Song Lyrics