Reposted from Google Apps Blog:
At Google, we want to make our products universally accessible and useful, and that means providing them for as many people as possible in the language they speak. The Gmail and Google Localization teams have worked together to bring Gmail to people around the world in 53 languages. Today that number grows to 54, because we’re proud to announce that through working with the Persian Initiative Team, we are able to release Persian (Farsi - فارسی), as the newest language available in Gmail. If you or someone you know speaks Persian, they can change the language in Gmail by selecting it on the Gmail settings page, under the language dropdown.
Gmail for mobile is also now available in Persian through your mobile browser.