In “Send emails in Hindi – Gmail Transliteration”, I had shown you how to enable Google Transliteration so that you could type words phonetically in English and have them automatically converted to an Indian language like Hindi.
Google has now released a set of bookmarklets that enable this feature on any website.
Checkout this Google help doc to find out how to enable it in your browser as well as use it on any website.
Or, drag the following link onto your bookmarks toolbar and then click on it once to enable it and click on it a 2nd time to disable it.
Here is a screen-cast of me using transliteration to type my status message in Hindi in Facebook.