DeafBlind Americans developed a language that doesn’t involve sight or sound

When Ser­na had some­thing to add, he respond­ed in pro-tac­tile ASL: he tapped and pat­ted his inter­preter (sit­ting next to him) any­where from her shoul­ders to her knees. She trans­lat­ed those taps and pats by sign­ing them in ASL, the most promi­nent form of sign lan­guage in the US with about 2 mil­lion users. A sec­ond inter­preter trans­lat­ed that ASL into spo­ken Eng­lish for me.