Speech is how we say sounds and words. Speech includes:
Articulation
How we make speech sounds using the mouth, lips, and tongue. For example, we need to be able to say the “r” sound to say "rabbit" instead of "wabbit.”
Voice
How we use our vocal folds and breath to make sounds. Our voice can be loud or soft or high- or low-pitched. We can hurt our voice by talking too much, yelling, or coughing a lot.
Fluency
This is the rhythm of our speech. We sometimes repeat sounds or pause while talking. People who do this a lot may stutter.
Language refers to the words we use and how we use them to share ideas and get what we want. Language includes:
Semantics - what words mean
Some words have more than one meaning. For example, “star” can be a bright object in the sky or someone famous.
Morphology - how we make new words
We can change words and change their meaning. For instance, we say “friend,” “friendly,” or “unfriendly” and mean something different each time.
Syntax - how to put words together
In English we say, “Peg walked to the new store” instead of “Peg walk store new.”
Pragmatics - what we should say at different times
For example, we might be polite and say, “Would you mind moving your foot?” But, if the person does not move, we may say, “Get off my foot!”