J.B.
Hello M. G :) (I like the screen name!)
Just a little background info - before starting a business with my husband, I was a speech-language pathologist and worked with the early childhood population (birth - preschool), so this does concern me a little. Without more information, I would hesitate to get too worried, but I would follow the other recommendations to have him evaluated by the school district as a first step to getting help.
Here are some considerations in the meantime and questions that a speech pathologist will want to know:
1.) Is he making eye contact, playing with peers, and engaging in tasks with you/peers?
2.) Does he understand instructions and follow them? What about two-step requests (pick up the book and hand it to me)?
3.) Does he answer yes/no questions? Questions where he's offered choices? He can answer nonverbally (by shaking/nodding head or pointing when you ask a question) or verbally with words.
These are just some basic skills he should be doing at this stage. Although there is a huge variation in children's language development (especially if he comes from a large family and is kiddo number 3 or 4), you should be able to answer 'yes' to the above questions. Even still - please get in touch with your local school district for an evaluation. It's free and does not guarantee he will or will not need services - but if he does - the beginning of the school year is the best time to start.
In the meantime, here are a few suggestions to help him:
* Narrate what you are doing and what he does when playing, shopping, cleaning, etc. - but don't be a broken record. Leave pauses for him to interject a word or sound too.
* Encourage him to make choices verbally, but if he won't - at least encourage him to point first. Then say what he chose. For example: "Do you want a pear or banana?" (point) "Ok, banana. You want banana".
* Once he masters this, you can request he says 'banana'. Example: "Do you want a banana or an apple" (point) "Ok, banana. Use your words - say 'banana'". As much as you may want him to say 'please' and 'thank you' - skip the manners for now unless he easily says one or two words on his own.
* Play with books that he finds engaging, but instead of reading them - look at the pictures. You can point to something and look at him to see if he labels it on his own - this works especially well with a book he's familiar with and that have a predictable outcome.
These are just a few suggestions, but I hope it helps. After a speech person evaluates him, s/he'll have many more 'at-home' suggestions for you to try, which are important to do because that is where he does the most learning - at home or at school - not in an isolated therapy room. :)
Good luck!
J