It doesn't sound Congolese, must be something from west-africa. Animating in foreign languages was a trend since Kibuisa Mpimpa, Bill Clinton animating some parts in a Northern Cameroon dialect (but years claiming that it was Wolof) and also animating in foreign language in Madame la Torture when he was in Les Marquis, Kerozene animating in Zulu in Effrakata and in Malinke in Affaire d'Etat, etc.