my son started talking lately only 6 months before he started talking alot before that he used to says only few letters and words now what ever we said he can understand and giving reply but clarity of vocabulary is missing

A. Clarity of vocabulary or the clarity of the speech or the words are pronunciation can be cleared by the age of 9 to 10 years of age also since your child started speaking little late try to work upon your child with all the issues that you are facing it is not a problem which just needs effort from you and from your child