Thanks Prof Peter and welcome to the Mudcat community. There are a lot of friendly, helpful, knowledgeable people here.

My personal opinion on whether to change the lyrics is that I would respect the original writer/performer. Jelly Roll Morton was probably writing lyrics which reflected the language he heard and said in real life at the time and in the place where he lived. There are many variations of English language spoken around the world and I think that makes it more interesting.

That's just my opinion. You can make your own decisions of course. :-)