Hey Martin,
Thanks for reaching out to the community. As you may know, our translations are all made by the community. So if there are any errors that you know how to fix please open a ticket and provide us with the translation files then we will push it out to everyone. The funny thing about this specific translation is when you google translate Declude it translates in german to exclude maybe it's an autocorrect thing. 😃 But please let me know if you'd like me to open a ticket for this translation issue so you can provide us with the translation files.
Kind Regards,
Zach Sylvester
Software Developer
SmarterTools Inc.
www.smartertools.com