Imperial Basic
From Wookieepedia, the Star Wars wiki.
Imperial Basic was the official language of the Galactic Empire and one of the two official languages of the Imperial Remnant, the Fel Empire and Darth Krayt's Sith Empire. It was presumably a form of Galactic Basic Standard.
[edit] Behind the scenes
In the novel X-wing: Starfighters of Adumar, Wedge Antilles notes that Imperial Basic is highly accented when compared to the Basic spoken by the New Republic soldiers. It is assumed that this accent refers to an analog of British-accented English, as is presented in the original trilogy movies.
