When we think of “being bilingual” we often think of spoken language – but someone can also be bilingual in, say, their mother tongue and Braille; or their mother tongue and British Sign Language (or American Sign Language); or English and Makaton. And in our modern world we have flexible, supportive technology that can help us, such as the PENfriend family and various apps. Did you ever wonder, however, about the origins of some of the languages used in SEN settings?