Sprachregelung is a German language term meaning "convention of speech". It refers to a formal or informal agreement, or order, that certain things should be expressed in specific ways in official communications by an organization or by a political entity. It can also cover such concepts as agreed "lines-to-take", talking points, and the exertion of message discipline. An example came in January 1945 when Ribbentrop sent emissaries to contact the Western Allies in Sweden and Switzerland, aiming to negotiate a separate peace; they carried with them a list of Sprachregelungen to ensure they gave the same message. https://en.wikipedia.org/wiki/Sprachregelung

Most of us use “reactive” language in our day to day lives: “I CAN’T do that because I HAVE to do this“.
The problem with using reactive language is that it becomes a self-fulfilling prophecy: Re-enforcing the belief that we are pre-determined.
Using reactive language absolves you of responsibility and makes you powerless: “I am not responsible. I am not able to choose my response. There is nothing I can do about it”.
https://czarto.com/2013/08/03/reactive-vs-proactive-language...

To me, a Sprachregelung is less fixed in stone than a language convention. Groups, institutions, all sorts of entities often set up their own (idiosyncratic) rules for members on whatever 'labels' they want them to use for things, persons, or concepts in internal/external communications.