It doesn't sound retarded at all. I'm quite impressed that he speaks more than one language. It is unusual after all, especially for an American actor. Of course, his background explains the Danish and Spanish, but it is still quite impressive that he wants to speak it and wants to learn more languages, i.e. Japanese and Lakota.

And I like it that the Danes refer to him as "their Viggo". That is so cute! :D And I think, he likes it very much. :)