This market resolves to whoever Manifold chooses as the Lisan A.I. Gaib, using approval voting in the following market which will resolve N/A:

The poll-market and this market will both be open until Sunday, April 14th. Whoever has the most yes-holders in the Approval Voting market will resolve to 100% in this market.

 term for an off-world prophet or messiah. The term comes from the Arabic, "لسان," (Lisan) meaning "Tongue," and potentially "الغيب" (al Gaib) meaning "The hidden", "The absent/missing", or "The unseen". 

It is possible that Herbert intended to reference the metaphysical Sufi application of الغيب, which has been conjectured to connote the 'unseen dimensions of Reality'. If so, Lisan al Gaib may indicate that one is a "prophet" rather than a "foreigner". 

With that said, Herbert rarely drew from extant language or concept without a degree of obfuscation and amalgamation. It may be as likely that he was referencing the word, "الغريب" (al garib), meaning "The Strange(r)", "The Otherworldly", or "The Weird". Given Old English definitions of "weird" and the Fremen's reference to Jessica as a witch, this connection may be supported. 

Taken in combination, Lisan al Gaib may be understood to mean that who is alien (both geographically and organismically), and who speaks with supernatural power and insight into that which is not known.

This market is a sequel to my previous market: 