The Joomfish installation is based on the standard package installation routines from Joomla. The package comes with a unified installer for all the relevant core extensions such as administrative modules and plugins. However you need to find and install all additional languages you like to use on your Joomla website.

The following video explains a step by step procedure to download all relevant files and install them in an order that is easy to follow. It also shows you how to verify that your installation was successful. Of course this is only one way how to install these packages.