Ubuntu: Change the system folder name back to English

see: http://askubuntu.com/questions/398555/change-the-system-folder-name-back-to-english

Open a Terminal and run

LANG=C xdg-user-dirs-update --force

Log out and log in again to apply the new configuration.

This will just configure and create the new folders but not touch your old folders or copy any files. You have to move the files from the old folders to the news ones yourself.