The Mongols have sent a traitor into the Japanese camp. If they can't be defeated by the horde, can they be defeated by an enemy within?
But this Mongol general 
named Nergui or something...
...لكن هذا القائد المغولي المدعو نيرغوي أو ما شابه
Aber der mongolische General,
Nergui oder so ähnlich …
Mais leur chef,
Nergui ou je ne sais quoi,
Ma questo generale mongolo,
di nome Nergui o qualcosa del genere...
Mas um general mongol chamado 
Nergui ou algo do tipo...