Explanation:

• Sarojni Hembram of the Biju Janata Dal spoke in Santhali, an Austroasiatic-Munda language spoken mostly by tribals in Odisha.
• She raised the matter of public importance during the zero hour.
• Srimati Sarojini demanded Bharat Ratna for Pundit Raghunath Murmu, the Santhali scholar who introduced Ol Chiki script for the language in 1925.
• Santhali language was included in the Schedule 8 of the constitution through the 92nd Constitutional Amendment act, 2003. Along with the language, 3 other languages were included namely Maithili, Bodo, Dori.
• The language is predominantly spoken by the North Mundari Group of the Austroasiatic-Munda family. The language is spoken in parts of West Bengal, Jharkhand, Assam, Odisha and also in Nepal and Bangladesh.
• The Santals are the third largest tribal group in India. They are called Horhopon ko (Sons of Man), Hor Ko or Manjhi. They are classified as Scheduled Tribes in the states of Jharkhand, Odisha and West Bengal but not in Assam.