so, i tested your unattanded file, and you got some lines like this:
<SystemLocale>en-us</SystemLocale>
<UserLocale>en-us</UserLocale>
<UILanguage>de-DE</UILanguage>
<UILanguageFallback>en-us</UILanguageFallback>
<InputLocale>0409:00000409</InputLocale>
but you removed via winreducer the english keyboard and language
after testing your file i got the same bluescreen, but after changing those line to:
<SystemLocale>de-DE</SystemLocale>
<UserLocale>de-DE</UserLocale>
<UILanguage>de-DE</UILanguage>
<UILanguageFallback>de-DE</UILanguageFallback>
<InputLocale>0407:00000407</InputLocale>
the installation went on without any problems !!!
EDIT:
so like i already said, you should use winreducer to create your unattaned file (it can create it with everything you needed)
so plz try it again and hopefully you can post a positive reply