Hello ! I read your question and understand your concern. It is a very complicated situation and the recovery depends on many factors including the time of diagnosis and treatment, the cause of the limbic encephalitis( the recovery is more rapid in herpes infection and is very difficult in paraneoplastic cause), the age of the person. Most of cases ( infectious cases ) recover and gain most of the fuctions within 2 months. I would say that there are a lot of patients with remaining cognitive deficits, who don t gain their prior performance. I would like to know if the cause of the encephalitis was found . I would recommend you to be patient and work with him, help him with his verbal rehabilitation and memory tasks. Hope to have been helpful! Best wishes! Dr. Abaz Quka