A black Atlanta teen named Rueben Nsemoh got a concussion after being kicked in the head while playing soccer. He was in and out of consciousness and he ended up in a coma.
When he awakened he could no longer speak English, his primary language, but he instead spoke fluent Spanish, a language he had never learned. One might ask how this is possible but it does happen. This story happened 6 years ago, not sure how he is today.