One of the fascinating things about this study is that some regions don’t have a word for something that other regions do. For example, when it’s raining and the sun is shining at the same time, parts of the US would call that “a sunshower” while other parts (like where I’m from) don’t have a word for that particular occurrence.
I think that is a great example of how language acquisition depends on sociocultural factors.
Another great example is with how the first syllable in “Bowie” is pronounced. Texas is one of the regions where people say it differently than most other speakers in America and it’s been explained by the fact that Texans pronounce it after a man named “Jim Bowie”, who was a prominent figure in the Texas Revolution.
Again, sociocultural factors influencing the way different people have acquired language.