To clarify -- the card included in Spielbox will be the German language form of Black Market.
Black Market and Envoy are being made available in English through BGG together. You can find ordering information for this on the front page of BGG.
As of now, I do not have any information if these cards will be made available in any other language.
They Might Be Developers
A bit off topic but I just had to squeeze in here and say that Lautapelit.fi has said that it will have the Finnish versions of Black Market and Envoy ready to ship in the spring. I've even preordered my Finnish ones.