What's the significance of the writing at the Dantooine Spaceport?

There's some writing that's repeated several times at the spaceport in Dantooine. But I couldn't make it out, and the Aurebesh guides suggest it says "zxczsd fczsc".

The signs, etc. in the rest of the game spell out valid words (though not always strictly applicable, e.g. there's only one "Cantina" sign used in multiple places even though it references the Telos Cantina). That being the case, is this an in-joke or reference of some kind, perhaps the game designers' initials? Or is this just hastily added nonsense text?