Black Speech

The Black Speech was created by Sauron during the Dark Years to be the sole language of all the servants of Mordor, replacing the many different varieties of Orkish and other languages used by his servants. When Sauron was overthrown at the end of the Second Age the ancient "pure" form was forgotten by all but the Nazgûl. When Sauron returned it was once again made the official language of Barad-dûr. However, a more "debased" form was used by the soldiery of Barad-dûr at the end of the Third Age.