How?

I don't think you would need to pay so much. In most cases i.e. not health, not children etc you can even self certify: https://europa.eu/youreurope/business/product-requirements/l...

He indeed re-implemented the MaMMUT: https://github.com/lucidrains/MaMMUT-pytorch

I wonder if there is any actual market for such product. From what I understand the idea is to somehow teach people Braille by reading the text, is is really the economical way to teach Braille? Particularly in India?

They could just put braille bumps on keyboards.