As I understand it Linear A is thought to be in the Minoan Language, thought to be from Anatolia, possibly Hittite in origin, and Linear B is thought to be in an ancestor of Mycenean Greek? Am I correct, and is the inscription certainly in a version of Linear A?
The Phaistos inscription is unique. Linear A, Linear B, and Cretan hieroglyphic was first discovered by Evans, who spent the rest of his life denying any of the writing systems concealed Greek. Linear B is a syllabary, was apparently adapted from Linear A, and various claims have been made for Linear A — that it hides an Anatolian language (Barry Fell), or Semitic (uh, I forget who), etc — but it has been generally admitted that Linear A was not used to write Greek (even though a couple of mavericks say they’ve cracked it as Greek). In “Lost Languages” the opinion is expressed that, short of finding another archive of tablets, Linear A will never be cracked because the known samples are too small (compared with Linear B, found in quantity by Blegen on his first day digging at Pylos). Cretan hieroglyphic was found in just a few examples (not sure if there was a tablet or two, or not, or merely short inscriptions on pots or something).