Detecting language and rewriting url Drupal can automagically detect the language to use when displaying content :


Based on URL
Based on User preference
Based on Browser language.


However, when I request a url like : http://mysite.com/toot/lala, Drupal detects the english language (browser settings), but it doesn't rewrite the url to : http://mysite.com/en/toot/lala

I'm afraid that this behavior will induce Duplicate Contents errors.
Does someone know how to correctly set this redirection ?
The Global Redirect module will help you with that issue.

It has a redirection system specific for language prefixes, preventing content duplication.