Currently i am translating the german content of my website into english language. Before i can post the new content i am activating multi language support of Drupal. Since i am trying out some features i can not exclude that you might experience unexpected bahaviour. In general only few pages/stories are translated. More will come in the next weeks.
A typical issue is error 404 - URL not found. In most cases the URL contains the string /en/ which should not exist. Try to replace it manually by a slash.