hi sher, he will be assessed by a group of medical professionals in certain areas to gather an all round perspective of his medical and educational needs. these assessments will be carried out over months, probably at a family or health centre, he will be seen by speech therapists, a consultant paediatrician, his hearing will be tested, you will be visited by an educational psychologist who will ask you a lot of questions about your son.
this is all done to gauge possible reasons for his lack of speech and to assess whether he has educational learning difficulties. he may receive a diagnosis at the end of the assessment should the findings lead to a specific difficulty.
occasionally assessments can conclude that there are no grounds to issue a statement of special needs, this can be appealed. in which case he would go to a mainstream school as normal.
should he receive a diagnosis at the end of the assessment its likely that he will receive a statement, depending on his needs will depend if he will receive extra help in school, a school with a special needs resource base or a special needs school.