Echolalia is when a person repeats what another person has said, either immediately after or later on. Echolalia is a normal part of language development but usually stops by about age 3 when children have acquired more developed language skills. If a person over age 3 is still regularly engaging in echolalia, it's possible something else is at play.1 Echolalia is usually associated with autism spectrum disorder (ASD), but some people with ADHD also engage in echolalia.