Infact, we wanted to support more Indian languages like Tamil, Malayalam, Gujarathi, Punjabi, Marati etc. However, currently we do not have enough support personnel to manage articles in those languages.
We will definetely add more languages in future that will add more user base to the web site.
I saw the link you have posted. I think it will be useful to the members for writing in hindi and then copy paste on boddunan.com.
I would prefer Google Indic Transliteration to any other as they are doing really good in converting the language in better way.
Here is the link to type in Hindi and other languages.
www.google.com/transliterate/indic