Function getNextInstalledLanguage 

pub unsafe extern "C" fn getNextInstalledLanguage(
    iter: *mut TidyIterator,
) -> ctmbstr

Given a valid TidyIterator initiated with getInstalledLanguageList(), returns a string representing a language name that is installed in Tidy. @param iter The TidyIterator (initiated with getInstalledLanguageList()) token. @result Returns a string indicating the installed language.