If India wants Hindi to gain official status, a majority of the 192 UN member countries must agree to make the language official. India would have to do major political lobbying to gain any kind of support from the UN’s membership. Also, India would need to provide financial support for an estimated $14 million worth of translation and interpreting services.
The problem with this scenario is that the UN is already providing translation and interpreting services for six other languages. Also, Hindi as an official language is not fully supported within its own borders. The campaign is being resisted by southern Indian territories that speak another primary language, whose members see the Hindi proposal as political maneuvering.