Complex sentence: The use of former Austrian aristocratic titles such as archduke is in fact illegal in Austria, but members of the family who are citizens of other countries such as Germany, where aristocratic titles have become part of the name, may use the title.
Split into simpler sentences: The use of aristocratic titles such as archduke is in fact illegal in Austria. However, some members of the family who are citizens of other countries such as Germany, where aristocratic titles have become part of the name, may use the title.