Eusan Technical Standard is a language designed to be written in complex shorthand and spoken as a language for draftsmen, engineers, communications specialists, foremen, traders, and offiziers.

It is not a conlang; it is Mandarin, also known as Putonghua.

In some areas within the Nation and Empire, it is still used as a primary language over Standard. ÆON isn't a fan of this, however.