Ontology IRI
https://www.omg.org/spec/LCC/Languages/ISO639-1-LanguageCodes/
Project page
https://www.omg.org/spec/LCC/AboutLCC/,https://www.omg.org/spec/LCC/Languages/AboutLanguages/,https://id.loc.gov/vocabulary/iso639-1.html,http://www.loc.gov/standards/iso639-2/php/code_list.php/