Does epilepsy cause aphasia?

My mother had her first seizure in 1983 at the age of 38. To this day she does not know what caused it so late in life but she suspects that it's because when she was 6 years old, her cousin was swinging on a swing while she was playing on the ground and he accidentally kicked her in the head. But would it take over 30 years for the first seizure? Also, starting about 2014 or so, she has states of aphasia after a seizure which lasts several days, in one case for about 3 weeks! Sometimes, she has the aphasia without the seizure. One time She was normal all day then towards the middle of the day she opened her mouth and was unable to speak. She had a 24-hour ambulatory EEG and the neurologist couldn't find anything wrong. Is there a connection between seizures (even the petit-mal) and aphasia? Or, is the aphasia something seperate? The aphasia usually occurs in the middle of the night, I suspect from lack of sleep. Her first aphasia was due to alcohol withdrawal, but she hasn't had a drink since she went to detox in January of this year (2017) so despite 10 months without a drink, she still has the aphasia. Even in between, she has trouble remembering words every once in a while but can still speak for the most part. But she has trouble remembering. She asks me a question then asks again later that day when I've already answered. She and I are worried that she will end up completely incapacitated and spend the rest of her days in a skilled nursing facility or rest home.