I had 2 languages with links "en" and "french" . Using custom labels i had created custom label with 2 languages. when i click french the words in visual force  page must change into french language and when i click on "En" the same french text must change into English. 
how can i achieve??

I had 2 languages with links "en" and "french" . Using custom labels i had created custom label with 2 languages. when i click french the words in visual force  page must change into french language and when i click on "En" the same french text must change into English. 
how can i achieve??