Hijacking since you're dev for a straight answer. There's mentions of multiple voice choices. Is one of them a sampling of the red queen in RE movies? I loved her dialect/voice.
sadly no. CoquiTTS integration was in the making, where you have some voice cloning features, but I had to delay it, as it required some newer versions(python 3.9) and I think it was 64bit only.
Currently you got the following choice:
Pico,
Mycroft,
Google Standard/Wavenet,
Amazon,
IBM Watson
And while using one of the cloud variants might cause security concerns, keep in mind, they will only know what to speak, not why (e.g. what your input/request was)
Ah yes. If ever I want an AI assistant to inform me of my imminent death, I want it to be using that voice.
"Hey Alice, call an ambulance."
"You are going to die."
"Thanks Alice."
https://www.youtube.com/watch?v=wSmYSZGMZj0