So you need to get your English website translated into German, Japanese, Spanish and Korean. Your globalization team comes back with a document that says:
en into de, jp, ko, es
What new language is that? Well, it’s not really a language, but rather internationally accepted abbreviations for world languages. “En” represents English, while “de” represents German and so on. And now to your next question: How did they get “de” from the word “German”? The word in German for the German language is Deutsch — hence the “de” abbreviation.