"This one is my throne!"
Translation:Kesy ñuhon dēmalion issa!
It's the same word, just declined for different nouns. "Dēmalion" is a terrestrial noun, and "ñuhon" is the form "ñuha" takes in front of those, if they're in the singular. For the full list, see https://wiki.dothraki.org/High_Valyrian_Adjectives#Class_I