Language is a direct result of reason (i.e. purpose and understanding)in my opinion. I don't know about a language organ (at least not in the typical sense of the word organ)but if nothing else a complex and rational pattern of energy that is highly ordered and consistant. Without the specifics, it is not simply biological in it's entirety, but rather that the biological funtion was created to compliment a spiritual foundation for the senseble nature of language.
All of that is right off the top of my head so don't ask for sources...
(John 1)In the beggining was the word, and the word was with God, and the word was God... ...And the word became flesh, and dwelt among us.
Without something to say, there would be no language. So the 'idea' or 'Spirit', as well as the need or purpose (an assuption of understanding if not a total control of nature by understanding) preceded the physical function.
In fact, for creation to be, God Spoke...
If that seems completely stupid to some of you, oh well, it is just way (way!) under your head.