CGML (Celogeek Multi Languages), It’s a plugin that allow you to link many blog in different language together.
Transforms the output of the Multisite Language Switcher to an HTML select
Substantially increase performance of localized WordPress by caching the translation (l10n) object. Supports multiple languages.
Unlike other localization plugins, KVL uses shortcodes to interpolate the translations. Maintaining the translations is easier this way.
Remove any language content on your WPML site. It is useful when you no longer want the content of a specific language.