Allspeak

Limits
"In the old days, sometimes magicians would document their spells and magical secrets in an unidentifiable language of their own creation. It served as a kind of code that only they could translate to prevent other magicians from stealing their magic or to give them the upper hand in battle. This doesn't look like it's its own language but rather a clusterfuck of different languages with no rhyme or reason, no inherent cohesiveness except that which the author meant to give it. And unfortunately, that knowledge lays on solely in his or her mind. Look guys, I'm sorry. It might be magic...but even I can't read this."