if a person is born deaf what language do they think in

A person born deaf typically thinks in the language that they primarily use to communicate, which is often a sign language such as American Sign Language (ASL) or another visual-spatial language. They tend to think visually and spatially rather than in spoken words. For many deaf people, their inner thoughts consist of images, signs, and sometimes written words if they are literate in a written language. Some may also experience an inner monologue in sign language, similar to how hearing people hear an internal voice when thinking. If a deaf person uses written language primarily, their thoughts may resemble written inner dialogue. Deaf individuals who are bilingual in sign language and a written/spoken language might have a complex interplay of visual and linguistic thoughts. Importantly, the nature of inner language and thought varies based on individual experience, language exposure, and whether a person was born deaf or became deaf later in life.