I never said they weren't bangladeshi. I said they are not Bengalee. Saying they are not Bengalee does not mean someone is not Bangladeshi. They have Bangladeshi nationality, and that's where it ends. They have had to hide their heritage since 1971 out of FEAR.
Unfortunately, you don't know any of them, so you wouldn't know. If DM facility was available, I would gladly introduce you to them on social media and the efforts they are engaging in to raise awareness of their people and dhakaiya urdu. Bangla being Lingua Franca is debatable as it would be rare for anyone of them to speak even conversational level Bangla (pre 1971). Prime Minister Nizamuddin had to have his speeches translated into Bangla which is common knowledge.
Bangla language movement has come full circle and now multiple movement for recognition of indigenous languages of BD are taking off vying for recognition. Not state recognition, but recognition that they are not a lower, corrupted form of Bangla. We are not Bengalee. The bangla language movement was nothing more than a ethnic fascist language supremacist movement led by useful idiots to give some form of rationalisation for breaking Pakistan.
@IndianLite
Whether you know Hindustani is irrelevant.