What do you call a person who repeat the word?

Answer 1

Immediate Echolalia: Echolalia is the repetition of vocalizations made by another person. Echolalia can be present in autism, Tourette syndrome, aphasia, Rubinstein-Taybi syndrome, developmental disability, schizophrenia, Asperger syndrome, Alzheimer's Disease and, occasionally, other forms of psychopathology. It is also frequently found in blind or visually impaired children, although most will outgrow this behavior. When done involuntarily, echolalia may be considered a tic. That's from Wikipedia. Just research Immediate Echolalia to see if this is what you're looking for.

Answer 2

A person who repeats the same word or phrase is often referred to as a "echolalic." This behavior is sometimes seen in individuals with neurological or developmental disorders like autism.