idiolalia
/ˌaɪdɪoʊˈlɑːliə/; /ˌaɪdɪoʊˈlɛliə/Definitions
1. noun
A type of speech disorder characterized by the repetition of sounds, syllables, or words, often resulting from brain injury or disease.
“The patient was diagnosed with idiolalia after a traumatic brain injury.”