Many of the best Scrabble players are Thais who don't speak English (2014)
thestar.com.my
thestar.com.my
The site also features several other Guardian articles by the same author. Seems a little iffy?
Also speaking some Thai, I'm like you unsure this is any kind of useful insight. More useful would be that there's enough Latin alphabet signs in Thailand that all literate Thais can already sound-out English, even if they don't understand it.
i put it to you to think about how you can write a scrabble solver, if you're given the official word list. I don't think it's that much of a step up from a sudoku solver!