The Voice of Altair didn’t precisely come from the planet herself of course.  Somebody buried a very intelligent, though not cyber-level, computer system on the world and programmed it to talk to whoever terraformed the world.  The Voice of Altair thanked us for healing the world and welcomed us to the galactic community in every language spoken by the terraforming crews.  To say the least, we were real surprised at that.  It isn’t every day a planet talks to you.