Two things, first translations are a much bigger industry in German than in English, so you get a lot of French and Spanish translations. A book does not necess

Two things, first translations are a much bigger industry in German than in English, so you get a lot of French and Spanish translations. A book does not necessarily need to sell well in English, but it needs of course some reason that it gets picked up in the first place. On Science Fiction, I almost exclusively read English novels, to the point were I would expect to miss German ones. The entire surrounding infrastructure, dedicated SF blogs, fanzines, reddit, is just not there in Germany, so I read the English ones and consequently read English language SF.