This is very interesting Azizi!
It also raises another question in my mind.
There must have been a lot of oral history passed down among the early generations of plantation slaves. This must also have happened using the mother tongues from Africa. I would also think that song and music would have played a large part in maintaining at least remnants of these languages for a long period of time and that the line singing under discussion must have played a part.
   My question is what can be identified today in our English language as being part of this heritage? There must be a lot of hidden treasure there!
   The Gaels and the Blacks both came from tribal societies so there would be inherent similarities. Certainly the American Indian and the Gael have many similar customs that were developed an ocean apart. By examining our differences we often find that we are more alike than we first thought.
                  Sandy