Who cares? Partition of Bengal is done with. You Bangladeshis are free to Arabize/Persian-ize your language as much as you want, change your language completely to Arab/Persian, for all we care.
Having words like Allah and Roja in a Sanskrit based pure language like Bengali is beyond blasphemy, as these words have nothing to do with Indian culture, religion or heritage. India will always be a country that is going to live by its roots, we aint no leftovers of imperial invasions like the Muslims of the subcontinent...
The moghuls and british are just two of the most recent.....but dont you guys have a rich history of being invaded and ruled, so no doubt you are gonna be someones "leftovers"...maybe you need to freshen things up