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introduction and question about braille unicode

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From: mohammad suliman
Date: Apr 6, 2020 1:07AM

Hello all,

My name is Mohammad Suliman, I am a blind software developer. In the passed
few months, I had the chance to start to work on a web project aiming to
help blind people visualize graphs using braille, tones and speech. To
achieve this, we use braille unicode in a special way to represent our
data. Now this leads me to the question: do I need to set the lang
attribute of the braille text to some special value? Does this affect how
the screen reader announces this text? We noticed that some TTSs announce
the braille characters as braille pattern or something similar, others stay
silent, and others speaks gibberish. I doubt that using HTML or js code we
could control that, am I correct? Also, to be compliant with WCAG
standards, do we need to do something special for the braille unicode text?

Thanks in advance!
Waiting for your reply!
Mohammad