Revealing the meaning of her mark might be a way for Shiva to make some friends outside the sovereignty. It is no secret that there is a lot of resentment for the sovereignty in the galaxy. Their philosophy involves waging war against other species, so admitting that one betrayed that philosophy is not likely to garner a negative reaction outside the sovereignty.

Of course, it really wouldn't be hard to figure out the meaning of the mark.A simple online search would do it. It is public knowledge.