Adds a button to the admin toolbar. This buttons allows users to seamlessly switch between available languages.
Extract the zip file and just drop the contents in the
~/wp-content/plugins/ directory of your WordPress installation and then activate the Plugin from Plugins page.
It scans the language directory to build the list of available languages. To add a language, simple download the appropriate mo file and add to your WordPress language folder.
This plugin was originally built as a means of plugin and theme developers to test translations of their plugins or themes.