TIL that the Walkman was sold as the Freestyle here in Sweden, which is why that word was adopted for any kind of portable music player.

It's one of those fun corners where Swedish contains an English word for something, which doesn't match the word actually used by people speaking English. :) This might be what linguists call a "false friend", but I'm not sure. I also love the German "beamer" (=video projector) in this category.