I don't know who linked language acquisition with intelligence. I talked late, but I started talking in full grammatically correct sentences. As an adult, I learn foreign languages easier than most. At the same time, I can only do basic middle school math and struggle with any type of analysis. As a high school junior, I failed miserably in Physics and Chemistry.
DH is a science genius who can barely spell and will never ever learn to speak a foreign language. Literally, explaining why his "no habla Espanol" should be "no hablo Espanol" is completely useless.
Your child will be good at something and bad at something else. So all this talk about "average" makes little sense to me. Do you mean you realize your child is not a prodigy of some sort? Won't finish school and go to Harvard at the age of 12? Who wants that, seriously?
