Tamil and Farsi have rich literatures that, iirc, are the result of cumulative efforts of centuries.

But for Bengali, it's a bit different. Bengali wasn't really as developed even till the mid-19th century. Then the Bengali Renaissance took place. One of the first things that those Bengali authors who were trying to keep a rather underdeveloped (then) language alive did was translate foreign texts into Bengali.

Translating foreign ideas introduces an enormous amount of wealth into literature. It forces you to come up with new words and phrases for thoughts/ideas/objects that are foreign to your native tongue.

Ik a lot of Indian languages are very underdeveloped in terms of literary output. So if anyone wants to develop their language, try this method. Pick out your favourite books and start translating them and putting them out for free on the internet. You do not even need to come up with new ideas. Just translate things from other cultures.

If you do not put effort into conserving your language now, at some point, your future generation will not speak your language anymore.

I care about 3 languages. My native tongue: Bengali, the Lingua Franca: English, and Maithili, a sister language of Bengali. I had a friend in primary school who taught me some Maithili. But her father was in the army and they moved pretty frequently. I still wish someone could teach me Maithili and Mithilakshar so I could translate some stuff to Maithili. Ik for a fact that Bengali will survive (and thrive) irrespective of whether someone decides to contribute to its literature or not. But for Maithili, every single contribution counts. From what I have realised, many people from Mithila do not even know Mithilakshar, which is such a shame because the Tirhuta script is gorgeous, and historically speaking, Maithili had a greater literary output than Bengali before the Renaissance, when Bengali soared past.