You can revert most DGS pages to English by adding "?language=en" as an argument to the end of its URL.
This can be used:

• To display the edit page for your user profile in English.
  This page can be used to recover from an erroneous language selection.
  
• To verify whether the DGS translators have made an accurate translation of a page. For instance this link
  will take you to the DGS introduction in English.
  
• To temporarily select another language, but remember that you must also have the appropriate character set installed. This feature is more useful to DGS translators. For instance, adding “?language=de” to the end of a DGS URL displays that page in German.