Sorry, nothing from me here. I just wanted to post a link to this awesome diagram, here.
It shows the relationship between language pairs, where one language uses the name of another language as its prototype for unintelligibility. For example, in English we say, "It's all Greek to me". (However, I'm annoyed by the non-inclusion of the English phrase "double Dutch".)
My favourite part of this diagram is the inclusion of "Heavenly Script". Sweet.