Tyra Tarkush means 'first language.' It is the highest form of indirect communication. In the Empire it is one of the official languages.
There are two schools of thought on the proper usage of Tyra Tarkush. One is that Tyra Tarkush should be used as one sees that it should (in other words, when it is necessary.) The other is that Tyra Tarkush is a holy language and its use should be reduced to preserve its sanctity. The first belief is the most prevalent, and Tyra Tarkush is used in partnership with the common language of beings of Catasore.