Here is a one page handout by the FIRST WORDS Project delineating language and communication milestones from 9 to 24 months of age in 3 month intervals. It was designed it to be given to parents and childcare and healthcare providers.
What is FIRST WORDS Project? It is a model early identification and intervention program based in the Department of Communication Disorders at Florida State University. This is one project worth emulating.
Nonetheless, going through their website would already give us a myriad of information on why early identification of communication delays is so important.
A child’s level of communication development may be the best indicator of a developmental delay.