Back in the ’90s, my great grandfather had a stroke. He was in a coma for 3 weeks, and when he woke up, he could not speak English. All he could speak was the Choctaw language. He had learned it when he was a kid because his family lived right near a Choctaw reserve. He spoke it fluently at that time but forgot it over his life to where he couldn’t remember any of it by this time. This went on for around ten days, and then he woke up from a night’s sleep and could suddenly speak only English again, not remembering a word of Choctaw.
On a brighter note, my ex-wife at the time stood beside me the whole time and no we are back together and closer than we ever were.