A question for our hearing-impaired folks that I'd put in research but it's honestly just random curiosity. I was watching the news the other night and the Prime Minister was giving a press conference. He and everyone in view were wearing a variety of cloth or surgical masks due to the ongoing COVID-19 threat, but the sign language interpreter was wearing a sort of a clear facial shield that didn't obscure their lips. Their hands were in full motion, but the clear mask made it readily apparent that the movement of their lips was important to the interpretation as well. I've seen this before, but I guess I always assumed it was a semi-conscious movement of the mouth and not integral to the interpretation. I know that various spoken languages have their own sign language equivalents and that at least ASL differs from spoken American English in some aspects of grammar and structure, but how important is the view of the mouth to understanding Sign? Tagging @Link the Writer and @Cdn Writer as you are the two members who I recall have discussed your hearing impairment on the forum, but anyone knowledgeable is welcome to chime in.