Which country has adopted Bangla as one of their state language?

In 2002, Bangla was announced as one of the official languages in Sierra Leone, a country in West Africa.

Between 1991 and 2002, Sierra Leone had suffered a long time of internal conflicts, during which the Bangladeshi peacekeepers, who were the largest part of the force deployed by the UN played a significant role in confining the conflict and in restoring peace.