Artechim he only has 2 words there and yes. He doesn't say mommy or daddy and the concern at this stage is that he will say a sound/word and never again. The SP is leaning towards oral-motor issues, possibly dyspraxia. He seems to have an inability to form certain sounds.
I don't have much time to reply but my daughter has verbal dyspraxia, will be back a bit later when I have more time.