The ancient Minoans were an advanced (for their era) culture, and left behind plenty of statues, sculptures, and written texts carved into clay and rock. Sadly, the one thing they didn't leave behind was anything that would help us translate them.
Linear A has a partner language called Linear B. We eventually managed to translate Linear B in the 1950s, but we've had no such luck with Linear A. The language was commonplace 3800 years ago, but we have no way of knowing what the Minoans wanted to tell us.