^ Agreed, good post.
I wouldn't dismiss Lao language too soon. A lot of Isaan people are culturally more Lao than Thai. They eat Lao food, listen to Lao music, speak Lao at home, etc.Given the way the Thai youth of today, even in one buffalo villages in Nakhon Nowhere, are connected to the internet; I think this next generation is gonna really come into itself in regards to finding a 'balance' between their innate "Thai-ness" and the need for English as far as their future is concerned.
They call it "Isaan" because the government here insists they are not Lao.