Hi,
After installing the Galeria and Xtra templates I am unable to install additional languages.
I got an error message: There are no available languages to install at the moment. Please click on the "Find languages" button to check for updates on the Joomla Languages server. You will need an internet connection for this to work.
I have tried on my other Joomla solutions (v3.3.6 and other developers templates) and they show the list when pressing "Find languages".
Any suggestions?

Another solution is simple lucky enough:
Download and install from
community.joomla.org/translations/joomla-3-translations.html