Create multilingual homepage
You need to use the Variable Translation for that:


  
  In Configuration > Regional and languages: Multilingual settings > Variables, enable 'Default front page' as a multilingual variable.
  Go to Configuration > System > Site information > Front page.
  Change the language via the section "Select language" at the top of the page to select the language for which you're setting the front
  page option.
  Set the 'Default front page' option for the current language.
  Repeat as necessary for each available language.
  


Relevant link: HowTo: Different home page (default front page) for each language