I was reading this question about kenku communicating using sign language, and was wondering about the other ways a kenku could communicate.
For example, the thaumaturgy cantrip states:
You create a sound that originates from a point of your choice within range.
It does not say that this sound can't be a person talking.
And kenku have the following racial traits (VGtM, p. 111):
Mimicry: You can mimic sounds you have heard, including voices. [...]
Languages: You can read and write Common and Auran, but you can speak only by using your Mimicry trait.
Does making talking sounds with thaumaturgy fall under the "you can speak only by using your Mimicry trait" restriction, or is it technically not considered speaking?