Dab wrote: Historically, what happened was that I happened to find a couple of references suggesting that Korean is the hardest-to-learn language. These references were suppressed by , apparently a Korean expat, for no reason other than WP:IDONTLIKEIT. 
 dab, I think you should explain to the users  and  exactly how the Wexler study that you found shows that Korean is the hardest language for toddlers to learn.