|Loss of ability to understand or express speech, caused by brain damage.
Over two thirds of the world’s population speak more than one language, generating interest in the field of bilingual aphasia and particularly its recovery. Among the many theories on recovery patterns, it is widely accepted that parallel recovery of a bilingual’s languages is the most common (i.e. both languages recover at the same rate). Of those cases of nonparallel recovery, the oldest theories on which language recovers best are the first language (Ribot’s law) or the dominantly used language (Pitres’ law). This review discusses the evidence for these theories in addition to considering influential factors of recovery, and exploring whether therapy in one language can transfer to untreated languages.