The 49-year-old actor, who joined the micro-blogging site in 2010, has 12.1 million followers.
"Also for all my fans, I will soon start tweeting in Hindi and Urdu also," Salman tweeted.
The first look of the actor's upcoming film "Bajrangi Bhaijaan" was recently unveiled. In the poster, Salman is seen sporting a rugged look.
The Kabir Khan-directed film also stars Kareena Kapoor Khan.