Possible Clues:

• Initially heard in New Delhi, Indian language
• Language used by party, banning extremists
• Language we got the words 'basmati' and 'juggernaut' from
• Language from backward island
• One attached to back language
• Language in 22-Across
• Language from which 'bungalow' and 'jungle' come
• Female individual's tongue
• Language within diary's concealed
• Source of the word 'bandanna'