This is a system plugin that allows you to override Joomla translation files for any component, module or plugin.  This is a feature that is built in to JEvents already but this plugin extends this to the core of Joomla and to 3rd party addons.

When activated this plugin allows you to override specific translation files.  e.g. Create a file templates/{YOUR TEMPLATE}/language/en-GB/en-GB.com_content.ini and place in it any language strings you want to override from the main language en-GB.com_content.ini.

For optimal performance this plugin should be one of the first in the system plugins BUT AFTER JOOMFISH.

Additionally can now override css files loaded by components, modules and plugins that use the Joomla framework for loading css files.  For example if an addon loads a css file called components/com_addon/css/addon.css then if you create a new css file in templates/{YOUR TEMPLATE}/css/addon.css then this will be loaded AFTER the original so you can override css settings you want to change.

Finally you can use Joomla 1.6 language files natively in Joomla 1.5 if you install and enable this plugin.

{XXXtoggle}Closed Title|Open Title|HTML content{XXXtoggle}