Adding Translations (-e) in the executable file of a Qt-Application :
As the explanations given on the Web were incomprehensible to me, I wrote my own, once that I had it running:
https://www.linuxquestions.org/questions/blog.php?b=39129
This way, you do not need to provide the language-files separately and do not have to pay attention to what the end user does with them. It just works.