According to wikipedia, Franz Josef's official title was the following. Demand people use that in press!
His Imperial and Royal Apostolic Majesty,
Francis Joseph I, by the grace of God Emperor of Austria; Apostolic King of Hungary, King of Bohemia, Dalmatia, Croatia, Slavonia, Galicia, Lodomeria, Illyria; King of Jerusalem, etc.; Archduke of Austria; Grand Duke of Tuscany, Crakow; Duke of Lorraine, Salzburg, Styria, Carinthia, Carniola, the Bukovina; Grand Prince of Transylvania; Margrave of Moravia; Duke of the Upper & Lower Silesia, Modena, Parma, Piacenza, Guastalla, Oswiecin, Zator, Cieszyn, Friuli, Ragusa, Zara; Princely Count of Habsburg, Tyrol, Kyburg, Gorizia, Gradisca; Prince of Trent, Brixen; Margrave of the Upper & Lower Lusatia, in Istria; Count of Hohenems, Feldkirch, Bregenz, Sonnenberg, etc.; Lord of Trieste, Kotor, the Wendish March; Grand Voivode of the Voivodship of Serbia etc. etc..