"Immediately after we received the information ministry order, we duly informed all the directors that they could not use English titles.
We've also pasted the order in our notice board," he told AFP Wednesday.
Gulzar said that up to 90% of the new movies which are registered with his association each month have English names, calling the phenomenon an "epidemic".
"A new myth has been created that films with English titles do good business here," he added.
The four biggest Bangla box office hits released during the recent Eid al-Fitr holiday period had English names - "The Hero-The Superstar", "Honeymoon", "Welcome 2" and "I Don't Care".
Local film critic Awlad Hossain said directors prefer to give their movies English titles "just to create some buzz".
"They think it'll add extra value to the film and draw teenagers to the cinemas," he said.
An information ministry official, speaking on condition of anonymity, confirmed instructions had been handed down to the directors' association.
"The aim is to uphold our local culture," he told AFP.