Mycroft
AI, creators of an open-source speech technology platform, has
released the Mimic 3 text-to-speech (TTS) engine with more than
two dozen languages and 100 voice sets. It can run completely
offline on low-end systems:
https://www.speechtechmag.com/Articles/News/Speech-Technology-News/Mycroft-AI-Launches-Mimic-3-TTS-153799.aspx
Cindy