You can experience Gmail in your native language.
  • Click on “Settings” link,
  • Choose your favorite language in “Gmail Display Language”
  • Select “Save Changes” button.
  • This will display Gmail in your native language.
You can also send message in yours/recipients favorite language, by clicking down arrow and selecting language, in format bar of the compose box.
Note: You can still set your default Gmail Display Language as English and send emails in other languages from the email compose window.