For Atlantis, Disney needed a new language for the Atlantean people. To do this, Disney hired Mark Okrand, the man who also created the famous Klingon and Vulcan for the Star Trek series. In the Atlantean language, Mark Okrand’s main source for it’s roots and stems of its words are Proto-Indo-European,but as Okrand also described it as being the “tower of babel” or “root dialect” for all languages in the world, he also used ancient Chinese, Latin, Greek, Biblical Hebrew, along with many other ancient languages or their reconstructions. As such, you can actually learn to write and speak the language!