The survey was organized by the NGO Bhasha Research and Publication Centre, Baroda, founded by G. N. Devy, a social activist, and was conducted by 3500 volunteers, including 2000 language experts, social historians.
The first six volumes were released at the Bhasha Vasudha Global Languages Conference in Vadodara on January 7, 2012.
[2] PLSI has followed the policy of including all languages in the survey, irrespective of the number of users.
The scripts that exist in Bengal are Ol Chicki (Santhal), Kol Ho, Barangh Kshiti, Lepcha, Sadri and Limbu besides Bengali, Urdu and Nepali.
[7] Languages with increasing numbers of speakers are Byari in Karnataka, Bhojpuri in Uttar Pradesh and Bihar, Khasi in Meghalaya, Mizo in Mizoram, Kumouni in Uttarakhand, Kutchhi in Gujarat and Mewati in Rajasthan.