However, the key commonality is that their spontaneously created languages resemble fully-formed languages. [snip]That result, if confirmed in other studies, could have profound implications. Another much-argued question in linguistics is whether there is some sort of grammatical template that acts as part of a language instinct and is wired into the brains of new-born children.
Now THAT is an interesting concept. I believe it could lead credence to the Tower of Bable story in scripture and how people could INSTANTLY begin speaking other languages.
It's not outside the realm of possibilities at all, and in fact, I think the idea probably explains the phenomenon quite well. There us a definite "language area" in your brain - "stroke out" the wrong areas and people can speak, but not understand language, or visa versa, or both understanding and speech can be destroyed.