'allolalic' originates from Greek, specifically the word 'allos' meaning 'other' and 'lalia' meaning 'speech'.

'allos' and 'lalia' combined in Greek to form 'allolalia', which eventually became the modern English word 'allolalic'.

Initially, it meant 'other speech', but over time it evolved into its current meaning of 'relating to a condition of speaking in a different language due to a disorder'.