Who is a NonSpeaker?
A NonSpeaker is a person who cannot use speech in a reliable or fluent way and includes people with no speech, those with minimal speech, and those with unreliable speech.
Why not say “Non-Verbal”?*
See D.J. Savarese’s answer to the preference for “NonSpeaking” over “Non-Verbal” at this link: NonSpeaking ≠ NonVerbal
*Note: This is the language preference of the majority, but any individual should be respected for choosing to self-identify with whatever language they choose.