jQuery.i18n ($i18n)

jQuery.i18n, sometimes referred to as $i18n, is a jQuery internationalization plugin to support multilingual development for your website or web app.

The plugin allows you to handle placeholders, plurals, and other i18n challenges with ease.

It’s a project by Wikimedia foundation’s Language Engineering team and used in Wikimedia Foundation projects.

The library uses a .json based localization file format, “banana” 🍌 - the localization file format for MediaWiki and other projects.

You can find more information on the jQuery.i18n official GitHub page