18 months ago I tried to teach my Raspberry Pi4 robot to use TFlite to recognize American Sign Language. (0% accuracy)
Since then my robot upgraded to a Pi5 and an Oak-D-W spatial camera with a dedicated neural net processor, AND I learned that Google gave out $500,000 to encourage folks to teach their computers to recognize ASL.
https://www.kaggle.com/competitions/asl-fingerspelling
Hopefully this will give my robot ASL as an input modality.