Looking for an OCR software compatible to be used with my Epson WorkForce 6430. Since I use the German software may I use this too? And if so, how do I use it, meaning what to be chosen in the menu for getting the readable PDF as output?
I don't think this application is right for OCR scanning. Instead, use something that has been developed for many years and it's constantly updated to support newer features and devices. The software is called ABBYY FineReader and it's probably the most used tool to perform OCR and save as PDF. Even Epson recommends using it on one of their Support pages.
Support page: https://files.support.epson.com/htmldocs/wf545_/wf545_ug/source/scanners/source/scanning_software/tasks/scanning_special_ocr_windows.html
Download ABBYY FineReader: https://www.abbyy.com/finereader/