My 22 month baby speak only few words like papa mumma Kya mum and few words more I m worried when will he speak proper way I have seen many babies speak more words what to do to increase his vocab

Kids learn languages at their own pace and time. But yes, there is a general timeline for most children. While you need not worry right now, know that if your kid only picks up one word during 19 and 24 months, you may want to visit the doctor. Also remember that premies take more time to catch up to a regular 2 yo. Having said that, if your baby doesn't pick up more than a few words a week, it doesn't mean anything is wrong. If he is responding to simple instructions he should be fine. And 22 months is still young to develop a full fledged vocabulary. Give him some time, you'll see the difference in just a few months.