Chinese in many respects is a more explicit language. Variables are generally required to "wear their types on their names". All the disease names contain the word disease (imagine if we must speak of "rabies disease" and "AIDS disease" as opposed to "rabies" and "AIDS"). Country names in general contain the word country, so you can tell from the name that France (lawful country) is a country whereas Chicago is not - something left implicit in English. (There are exceptions of course)