Shop is not translated correctly or only partially

Hello,
I have a problem with the translation of the shop in another language.
It is only partially translated. I have viewed and edited all the translations, but the emails to the shop operator and to the customer are not translated into German despite the language set and are sent in English. Where do I have to change that? And in the dashboard, the headings are not displayed in German. Can someone help?
Regards Ralf

I’m not associated with Joomdonation
I Look at SHOP STATISTICS & MONTHLY REPORTS EVERYWHERE

and I find this in...
administrator/components/com_eshop/assets/css/style.css

It seem that these terms hare hard coded in this in this css file ( I guess, you need to hard code the css file to german)
 

This is not the proper way to translate, you should ask eShop DEV’s to fix this to be integrated in their translation system

For 
 

Did you try the eshop “Translation” tool ?
 

For the “Offline Payment message” did you try?
 
 

Thank you Patrick!

The your solution should work.

Sincerely, Giang

No problem Giang.
Good Day!

Hi Patrick,

I will also check the your ticket and get back to you there soon.

Have a nice weekend!

Sincerely, Giang