There is A grammar error in the email settings user interface (UI) for 'username' and 'password' in German-Deutsch substantives; they are written in lowercase and are supposed to be uppercase for the first character.
In ArcGIS Enterprise 11.2, the German words for username and password are written in uppercase. Unfortunately, there is no way to attach a screenshot, but perhaps a version of 11.2 that is pre-final is being used.