Because the empires mentioned in the Bible were usually ruled by a king, the empires themselves are often referred to as "kings," "kingdoms," or both.  - Daniel 8:20-22.
4 Hi ntolovelo mimfumo leyi hlamuseriweke eBibeleni a yi fumiwa hi hosi yo karhi, mimfumo hi yoxe hakanyingi a yi kombetela eka "tihosi," "mimfumo" kumbe haswimbirhi. - Daniyele 8:20-22.