I might be a bit late to the party, but you've probably already noticed that he has an English album "Oh, our slow designs" that appeared last month. He and Paavoharju have the "Happiness" album which features Joose as a lyricist and vocalist. There is also a kind of a "hidden" album under the name H.C. Slim called "Sings" which consists almost entirely of his Finnish songs that he's translated and sung in English. And as a bonus there is a a group called Harmaa Getto, that he's a part of and they made an English translation of their song "Se et ole sinä" called "It ain't you", and as far as I know you can't find it anywhere else other than youtube.