Spengus Kahn Share definition Flag Emperor of the Spengenese Empire from 1206 to 1227. Founded what is widely considered to be the most complex language of East Asia, Speng. I heard they cast Woody Harrelson to play Spengus Kahn in this one upcoming historical film. Spengus Kahn by SpengDisciple November 11, 2018 Get the Spengus Kahn mug.