I asked the same question on Patreon; thanks for the response there.

I've done a bit of light coding to test this, and it's very easy using Azure (Speech to Text – Audio to Text Translation | Microsoft Azure) or Google (Speech-to-Text: Automatic Speech Recognition  |  Google Cloud).  Besides just being able to answer questions, I have in mind an entire scenario where the subject is required to learn phrases and repeat them.  Imagine being in the headmistress's room for a reward, and having to keep repeating phrases in front of the audience during.  Or, a new domme requiring it in her sessions.  It also wouldn't be difficult to set up a decision tree using grading for phrases the subject uses.  Keywords that were graded by level of kinkiness, degradation, etc.  Google, I believe has an ability to detect voice pitch and even gender of the voice, so you could even require male players to imitate a female voice successfully.  Lots of possibilities here.  You could do the simpler things with integrated speech to text (quite a bit of open source in this area), or the more complicated scenarios by leverage cloud conversion.  The latter would cost some money, but you could upsell the capability to profit on the additional cost.  Or just charge the user when they use that capability for added degradation. ;-)

Anyway, it's probably obvious that I've been thinking about this a little too much.  For my wife, obviously! :-D

p.s., happy to do some work here to map out scenarios if you're interested.  I'm in the sw business, so...