Sultan grammar—uses the same words for both women and men. However, this styling misconstrues the roles of wives of sultans. In a similar usage, the wife of a German field marshal might be styled "Frau Feldmarschall" (similarly, in French, constructions of the type "madame la maréchale" are quite common). The female leaders in Muslim history are correctly known as "sultanas". However, the wife of the sultan in the Sultanate of Sulu is styled as the "panguian" while the sultan's chief wife in many sultanates of Indonesia and Malaysia are known as "permaisuri", "Tunku Ampuan", "Raja Perempuan", or "Tengku Ampuan". The queen
Sultan consort in Brunei especially is known as "Raja Isteri" with the title of "Pengiran Anak" suffixed, should the queen consort also be a royal princess. In recent years, "sultan" has been gradually replaced by "king" by contemporary hereditary rulers who wish to emphasize their secular authority under the rule of law. These are generally secondary titles, either lofty 'poetry' or with a message, e.g.: Apparently derived from the Arabic "malik", this was the alternative native style of the sultans of the Kilwa Sultanate in Tanganyika (presently the continental part of Tanzania). "Mfalume" is the (Ki)Swahili title of various native Muslim