>>/823810/
It's clearly a minstrel song, the second verse would have been sung by a black face chorus.
At that time slaves hadn't race mixed so still had distinct African dialects, this one is sub Saharan, not francophone, this is pre south Africa so I'm saying swasi. It may not be swasi, but it's not Zulu or samali or Congolese so geographically I can't be more than a hundred miles off