A friend of mine who is a long time Thailand resident and former university instructor tells me that there is a version of Thai spoken in Korat called Tai Deung. I've asked around and no one, not even Ms. B, has heard of it. My friend says that he often finds Bangkok taxi drivers from in and around Korat who know all about it and who explain to him how it differs from Central Thai. It is supposedly a derivative of Central Thai and not Lao as is the case with some other dialects spoken in Isaan.
Can anyone enlighten me? Perhaps those of you with Thai partners could ask them about it?
TIA