I wonder if something like a locally run LLM would be a 10X better (and viable) solution? You could frankly use a chatGPT like UI to have even the illiterate part of the community converse and learn about any topic with tts and stt.
The illiterate part of the community would be better served by interacting with the community - by fostering connections between people, improving literacy, and giving them tools - rather than with any sort of LLM, let alone one that has been cut down enough to run on cheap, under- (and often intermittently-)powered commodity hardware.