The Rosetta Stone Language is a term used to refer to the Ancient GREEK language, which was inscribed on the Rosetta Stone. The Rosetta Stone is an ancient Egyptian artifact that was discovered in 1799 and is now housed in the British Museum. It is a trilingual stele written in three scripts: Ancient Egyptian hieroglyphs, Demotic script, and Ancient GREEK. The discovery of the Rosetta Stone allowed scholars to decipher the hieroglyphs, which had been lost for centuries.