Not naming names right now, but there are some CentralNotice admins who push banners in the so-called national language of a country, without setting a language selection criteria.
There is only one valid use case for this, which is a banner with an image and no text, which I don't think I've ever seen. Otherwise, we should be requiring that the message be translated. We cannot mix languages in the user interface, we need to be following either the interface or content language.
Let's make it impossible to deliver untranslated messages.