In the accusative case for korze, the singular and plural forms are the same, korzī. This sentence could also be translated as "Will you not hold the sword?" (singular). By the way, "gelte" and "anne" behave the same. https://wiki.dothraki.org/High_Valyrian_Noun_Declensions#Lunar-type:_gelte
If there is an adjective on these types of nouns in the accusative, it can often help to determine whether the noun is singular or plural. If not, then there's some ambiguity.