When a translation configuration is saved in the Backend, an event subscriber in locale
\Drupal\locale\LocaleConfigSubscriber::onOverrideChange()
saves it also in the "User interface translations"
as translation for the default (from config/install) configuration for the item.
If the value in config/install is something generic (eg "Yes") and is translated into something not so generic (eg "Ja, einmal") the translation will be very obviously wrong everywhere on the system (eg views listing Published Status as "Yes" will show "Ja, einmal" in DE)
Either change the text to something not so generic or Try to set a translation context for the texts
Fixed
3.0
Code
Added translation context "klaro" to all translatable strings
Automatically closed - issue fixed for 2 weeks with no activity.