Localization in node.js with express

Actually I use this NPM Package i18n

It have a very simple usage with Express framework... create locales folder (it.json, en.json, etc...)

// load modules at bootstrap
var app = express();
var i18n = require("i18n");

//set configuration
i18n.configure({
  locales:['en', 'de'],
  directory: __dirname + '/server/locales'
});
app.use(i18n.init);


// and then, in controller we can use response
res__('YOUR_KEY')

Front End side just set the HTTP header Accept-Language with value 'en', 'it', etc.

You can use language-translator library. It uses json files to load texts. You can define languages whatever you want.

• It supports parametrized requests.(that contains :parameter)
• It supports output text both of route file and view file.
• It is fully customizable.
• It uses and manage cookie to know user preference.
• It loads language file in middleware function by matching your route path and language file. No needs to require language files in every route file.
• It translates default language's json files' texts by using Yandex translate API. (Free)

I found few of the best libraries to deal with localization in nodeJS:

1. node-gettext - https://www.npmjs.com/package/node-gettext
2. globalize - https://www.npmjs.com/package/globalize
3. i18n - https://www.npmjs.com/package/i18n

node-localize can work for Localization in node.js with express.