Hi Mr Raghavendra,
You will benefit from consulting a good Epileptologist who has extensive experience in evaluating such patients and especially to look at which patient can benefit from curative surgery for Epilepsy
. It will be a good idea to continue with the speech therapy
sessions. some epilepsies may originate from around the speech centers of the brain and therefore can cause profound speech impairment and some children can loose previously attained speech as well.
Hope this helps