The Navy's problems were further exacerbated by the ten ethnic groups having more than 5% of the population comprising the Austro-Hungarian Empire. Officers had to speak at least four of the languages found in the Empire. Germans and Czechs generally were in signals and engine room duties, Hungarians became gunners, while Croats and Italians were seamen or stokers. The Austro-Hungarian Compromise of 1867 aimed to calm political dissatisfaction by creating the Dual Monarchy, in which the Emperor of Austria was also the King of Hungary. This constitutional change was also reflected in the navy's title, which changed to "Imperial and Royal Navy" (kaiserlich und königliche Kriegsmarine, short form K. u K. Kriegsmarine).