It would be much easier to see the source image used, and the two resulting German OCRed text.
Not that it is likely to make any difference, Keyboard Maestro uses Tesseract, and the Tesseract training data. It is technically possible to train it yourself, but it is certainly possible that the German training data is inadequate.
That said, in my testing in English, it has worked surprisingly well for me, although I do admit I generally am using it on “perfect” text, captured from screen, rather than scanned from a magazine article.