From what you say your baby is over active
He able to usual words like mum dad
No problem
Don’t get panic
Intelligent kids some time wants to impress you
Hence leads to this behaviour
Try to pretend that you don’t understand what he wants make him say in words
Reward him say by applause or by saying very good
Don’t discourage him
The hyper active will become normal by proper
Guidance needs some patience
Next Steps
You can go to child council for testing his hearing
Or IQ at near by centre if you are not sure
Health Tips
Put some charts of words and animals and teach him
And wait he will do well