My son, from 19 months old to almost 3 years old, had Speech Therapy, which was free, via our local "Early Childhood Intervention" organization.
Did not have to be referred by a Pediatrician. I simply called them myself.
They do an overall developmental assessment of the child.
This is all done in your home. And is FREE. Up until 3 years old.
My son, was assessed at being advanced in many areas. He was simply speech delayed.
He loved speech therapy.
He is now the MOST talkative one in our family with an astounding vocabulary and very complex speaking.
He understood EVERYTHING that was told to him since he was very young and is also bi-lingual and has always been very athletic too.
Speech formation... is age related and developmental based.
A 1 year old, 2 year old, 3 year old, 4 year old, acquires enunciation... per their age. It also entails mouth/tongue/lips coordination. Fine-motor coordination. Speaking in a 20 month old, is not like a 3 year old.
So, you can just check out your local ECI organization and just call and ask. It is free. You can choose to have it or not, per if your child needs it. No obligation.
Boys, gender wise, often speak later.
My son's Speech Therapist said, 80%of her clients, were boys.
Many times it is just a delay in speech and in enunciating sounds.
Other times, they do have a condition, such as Dysphagia or Apraxia etc.
But that is not common.
Or, you teach your child, sign language. I did that with both my kids.
My son, even if he was speech delayed, did not tantrum or get frustrated, because he was very creative in conveying his communication... and he also knew sign language. He was real 'articulate' even if he was speech delayed prior to receiving Speech Therapy.