I want to install another language. RTL?
1. Install your Joomla language http://community.joomla.org/translations
2. Language manager and install official VM pack http://virtuemart.net/community/translations/virt...
3. Add this language to content.
Please, don't ask how to install language in Joomla. See the video http://www.youtube.com/watch?v=2enpEbmFXXA
4. Adjust T3 multilanguage https://www.awesomescreenshot.com/image/4638238/f0fee16f45a54133154a4d85afe98c67
For RTL you need to turn on RTL support at Template settings