By age 1:
Recognizes name
Says 2-3 words besides “mama” or “dada”
Imitates familiar words
Understands some simple commands
Looks at familiar objects and people when named
Makes a variety of sounds or gestures, like pointing, waving or holding up arms
Between 1-2 years:
Uses 10-20 words
Adds new words regularly
Points to pictures, when named, in books
Combines two words (e.g., “mommy bye-bye”)
Enjoys simple stories, songs and rhymes
Makes animal/environmental sounds (e.g., beep beep, woof woof, etc.)
Identifies body parts
Between 2-3 years:
Uses k, g, f, t, d, and n sounds
Produces speech that is clear, even to familiar people
Uses two- or three-word phrases
Asks “what’s that?” And “where’s my?”
Combines nouns and verbs “mommy go”
Has a 450 word vocabulary
References:
https://www.ldonline.org/ld-topics/speech-language/speech-and-language-milestone-chart