If you need a multilanguage version you can use Rainlab Translate. Here is the plugin link Plugin. Watch the video and you will see how easy it is to set up a multilanguage theme.
If you just need to translate the theme in a different language, you can customize every single word in theme. It is just a demo content and every thing is ready to customize.
If you have further questions, don't hesitate to write me.
Have a nice day!