Install

npm i express-polyglot --save

Usage

1. Start by creating a folder in which you write your locales, Eg:

   App Folder
   |___locales
       |   en.js
       |   ar.js
   ...
   

   Every file should have module.exports, Eg:

   en.js:

   module.exports = {
       hello: 'Hello World'
   };

2. Now, in your app:

   var express = require('express');
   var polyglot = require('express-polyglot');
   
   var app = express();

As you can see, we changed nothing yet. 3. Configure Polyglot: (This is the default configuration)

```javascript
polyglot.configure({
    defaultLang: 'en', // Default language code
    directory: './locales', // Directory of your files
    aliasLangName: 'langName', // The property that will take language code in req (req.langName = 'en')
    aliasTxt: 'strs', // The property that will take language strings in req (req.strs.hello = 'Hello World')
    cookie: 'lang', // The cookie name in which the language code will be stored
    queryParam: 'lang', // The url parameter when switching
});
```
*If you have nothing to change to default values just don't use the method.*

4. Use:

   app.use(polyglot.load);

   Nothing to explain

5. Switching: Set a route where the language will be switched.

   app.use('/locale', polyglot.switch);

   Now to switch you can request '/locale?lang=ar'.

   If you changed the queryParam property, use your value instead of 'lang'

   This will change the language and the cookie.