Few days ago, I asked about Qualifizierter Drachenkopf to one of Mafia Wars Wiki Admin, Edricteo, It’s his answer,

Sorry for the late reply. I think you already get the answer to your question. Other than English Language, Mafia Wars can be played in four other language – Indonesian, German, French and Spanish. Therefore, it is possible to change your title to the respective language. Edricteo

Thanks for the answer, and thanks to Irvan Cartenz and Mat.

By the way, Admins account can use any custom title they like :
The Master | Custom mafia Wars Title
Zynga | Custom mafia Wars Title