He moved from Slovakia to Sweden at age 9. Everybody in Sweden can speak Engllish fluently (except maybe a few Sami reindeer herders in the far north, and a few people over 100 years old). Since then, he's had enough time there watching non-dubbed American and British films and listening to pop music sung in English to pick it up easily. Plus, he probably was communicating in broken English to Swedes, when he first arrived in Sweden. On the other hand, his Slovakian relatives still probably speak no English at all. When I last visited there in 1988, virtually no one spoke a word of English. It took me an hour of searching before I found someone, over 90,who could speak in German, with whom I could communicate.