There may be certain parts of your brain that are used by your soul in a cooperative unified relationship to produce language such that if some part of the physical stuff is gone awry, then you are not able to partner in the same way and make language or recognize language. There is certainly an interdependency between the soul and body. No doubt about that at all.
That's all this shows. This experiment demonstrates correlation. It doesn't demonstrate identity. It doesn't prove that the nouns, parts of speech, thoughts, and sentences are identical with stuff in your brain. They aren't the same thing.
This brings to mind some scriptures which indicate that words may be soulish properties.
Genesis eleven verses one and seven:
1. Genesis 11:1-8 TNIV
The Tower of Babel
"1 Now the whole world had one language and a common speech.
7 Come, let us go down and confuse their language so they will not understand each other."
2. Acts 2 where Galilean Jews were speaking to an assembly of people from many nations and languages. Each heard the message in their own language.
3. One of the gifts of the Holy Spirit is speaking in unknown tongues according to the NT.
4. Numbers 22:28 "And Jehovah opened the mouth of the ass, and she said unto Balaam, What have I done unto thee, that thou hast smitten me these three times?"
5. In Genesis one we read that the serpent kinds were more intelligent than other beasts of the field before the fall of Adam. The serpent in the garden held a conversation with Eve.
Possible conclusion: Perhaps language/words are a soulish property which Jehovah, the intelligent designer has designed primarily for humans, but which he has utilized in unusual circumstances for his purpose.
My shiatsu dog knows quite precisely when three o'clock rolls around as it's his feeding time. He acts like he sure would like to say so if my wife who feeds him is upstairs or something. The best he can do is sit up with his front paws sticking out at the bottom of the stairs and utter a growerol sort of sound. He's not allowed upstairs until bed time.
He, somewhat like humans but to a lesser degree, can think, reason a bit and beg in his limited capacity; but words? No.
BUZSAW B 4 U 2 C Y BUZ SAW.
The immeasurable present eternally extends the infinite past and infinitely consumes the eternal future.