True,tough to say...it also says in German:
"Ganzfigur in gelbem Kleid, nach links in einem roten Armlehnstuhl an einem Tisch sitzend. Mit perlenbesetztem Diadem, in der linken Hand einen Fächer haltend. Auf der Stuhllehne gesticktes fürstliches Wappen. R. u. signiert."
Arthur von Ferarris was born in Hungary,but during teenage period moved to Vienna where he stayed until 1876 when he moved to Paris until 1885 when again he moved to Egypt...he moved to Budapest in 1893 but in 1894 he left for Berlin,but soon again found himself in Vienna...
Those years might help to identify the person painted or even "locate" her...