echolalia

noun3

1. •
   The involuntary repetitive echoing of words or phrases spoken by another person; either immediate or delayed.

   • A child older than 24 months with echolalia as the only language is likely to receive a diagnosis of ASD[.] — 2026
2. •
   An infant's repetitive imitation of vocal sounds spoken by another person, occurring naturally during childhood development.
3. •
   Any apparently meaningless, repetitious noises, especially voices.

   • There was the boom of a bass drum, and the voice of the orchestra leader rang out suddenly above the echolalia of the garden. — 1926