Azizi -

What a job! This must require a huge effort! I can see how you can separate the religious from the secular but once it is secular, don't you have to account for the influence of the regional immigrants? For instance, Afro-American songs from Kentucky might have a strong Irish influence or those from New Orleans might be mixed with French flavours sprinkled with a dash of hoodoo.

I can't pick apart the tunes themselves so I guess I'll leave that up to you. I applaud your effort to reclaim that which has been culturally appropriated and hope that you can give credit where credit is due.