npm install express-languages
let expressLanguage = require('express-languages/core/ExpressLanguage);
let lang = {};
expressLanguage.setLang('en');
expressLanguage.setPath('./test/lang/');
lang = expressLanguage.get('test');
console.log(lang);
exammple directory : root/test/lang/en/test.json
test.json
{
"name":"Express Languages"
}