This response was posted by 'A. Rahman' on the BD Military Forum
''The Bangladesh Army has changed the rank title of JCO and NCOs back in year 2000. The changed titles are:
1.Lance Naik - Lance Corporal
2.Naik - Corporal
3.Havildar - Sergeant
4.Naib Subedar - Warrant Officer
5.Subedar - Senior Warrant Officer
6.Subedar Major - Master Warrant Officer
Basically it is a translation of old Bangladeshi/Mughal/British Indian Ranks to modern NATO/Western style ranks to increase interoperatibility between Bangladeshi and Western forces, particularly during joint UN peacekeeping missions.'
The Bangladesh Air Force also amended its rank structure in 2003.
Former Rank/Current Rank
Flight Sergeant - Warrant Officer
Warrant Officer - Senior Warrant Officer
Master Warrant Officer - Master Warrant Officer
A.Rahman has said he is going to update the rank charts on the BD Military Forum, but I haven't yet managed to find up to date insignia on the official Bangladesh military websites.