iso639-0.1.0.0: ISO-639-1 language codes mapping to Haskell datatypes from the official site (http://www.loc.gov/standards/iso639-2/php/English_list.php)

Index - R

RMData.LanguageCodes
RNData.LanguageCodes
ROData.LanguageCodes
RUData.LanguageCodes
RWData.LanguageCodes