my son is 2.5 and still says many words incorrectly. dog = gog, milk =mil, do it= dootoo, thank-you=day-day, outside=side, TV=TT and the list goes on.
He went to speech therapy at age two and will be going again in 4-6 months. the wait is LOONNNGG!
i have other kids within days of his age and they can all speak pretty normally for a 2.5 yr old, but my son, only me and Dad can understand him.
I know he is slowly increasing his vocabulary and pronounciation and he will cathc up. Im not too worried about it.
On the flip side, unlike the others his age, he knows his whole alphabet, upper and lowercare, he can identify and count to 30, knows about 9 shapes and 10 colours, so I know he is a smart cookie, its just the speech he has issues with. I truly believe that a toddlers brain choose what to work on for a time and then once thats mastered, they focus onlearning a new skill.