Deaf people are known to use sign language in their sleep. A case study of a 71-year-old man with rapid eye movement disorder and a severe hearing impairment showed him using fluent sign language in his sleep, with researchers able to get an idea of what he was dreaming about thanks to those signs.
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More people speak English as their second language than those who use it as their mother tongue. English has a total of nearly 2 billion fluent speakers and it is also the most widely spoken language in the world. However, only 350 million people speak this language natively.
Peyton List is multilingual. In addition to English, she is fluent in Spanish and has showcased her language skills in various projects.
Deaf people use sign language in their sleep. During a 2017 case study, a 71-year-old man with severe hearing impairment and “rapid eye movement disorder” was observed using fluent sign language in his sleep.