ech·o·la·li·a 
(ĕk′ō-lālē-ə)
(ĕk′ō-lālē-ə)n.
The repetition of words or phrases spoken by others, often occurring in people with autism spectrum disorder and certain other mental disorders.
[ECHO + Greek laliā, talk (from lalos, talkative).]
ech′o·lalic (-lĭk) adj.