The chorus of the song is borrowed from a huge 1986 hit called "Zangaléwa" by amakossa group called Golden Sounds.
The original song has these lyrics:
Zaminamina oh oh
Waka waka eh eh
Zaminamina zangalewa
Anawam ah ah
detailed article at
http://hubpages.com/hub/The-History-of-the-Official-World-Cup-Song-Waka-Waka