As nouns the difference between property and untranslatability is that property is something that is owned while untranslatability is the quality or property of being untranslatable; inability to be translated.
As a verb property is (obsolete) to invest with properties, or qualities.
Untranslatableness is a synonym of untranslatability. As nouns the difference between untranslatableness and untranslatability is that untranslatableness is the quality or property of being untranslatable; inability to be translated while untranslatability is the quality or property of being untranslatable; inability to be translated.