It sounds like "Khoikhoi" (pronounced it sounds kinda like "cola coy") which is the name of native South African people - also called "Hottentots". Not sure how that ties in with the song other than the "tribal" feel of Ant Music.
I love the native american indian type chanting they do in most songs. Unique to the core. Mashed potato rock steady rub, great lyrics. Still loving them at 45.