Union Home Minister Rajnath Singh and Bollywood actor Amitabh Bachchan will address the gathering on the concluding day of the conclave which will have a total of 28 sessions on a range of subjects relating to Hindi.
Search engine giant Google and iPhone maker Apple Inc will be among a number of technology companies which will participate in the exhibition at the event where they will highlight their efforts to popularise Hindi.
External Affairs Minister Sushma Swaraj, briefing reporters about the three-day conference, said 1,270 delegates from 27 countries have registered for the conference while 450 people have been invited as guests besides 250 noted personalities.
Asked whether Amitabh Bachchan will be paid any fee for participation, Swaraj said he has been invited in the category of noted personalities and he will be provided with accommodation, travel cost and transportation.
Swaraj said Bachchan has been an inspiration for promotion of Hindi through movies and he will speak on the subject "Aao Achhi Hindi bolein (Lets speak good Hindi)".
The themes for discussion at the conference include growth of Hindi in foreign countries, its expansion in non-Hindi speaking and southern states, Hindi in administration and science, scientific literature in Hindi, role of Hindi-Urdu ties in expansion of the language and purity of Hindi in journalism.
Swaraj said all the Chief Ministers have been invited for the three-day conference and she has started personally inviting them.
"Today I called up Bihar Chief Minister Nitish Kumarji.... There is no politics in Hindi," she said replying to a question.
