I once met a guy who did. He was in his 70s born in soviet Russia, emigrated as a kid in western Germany at 5 or 6, and was re-learning Russian at 70+ because h

I once met a guy who did. He was in his 70s born in soviet Russia, emigrated as a kid in western Germany at 5 or 6, and was re-learning Russian at 70+ because he forgot all about it.