You can already apply below by reserving your language, just submit a post:
Thank you, sir, for your meaningful post which impresses me a lot. I already translate all of the posts into my local language. I hope, in Bangladesh, it will be a much more helpful post to improve Bangali local boards' post quality. Thank you so much for your own @1miau creations with the help of @GazetaBitcoin who is my Ideal.
Like outlined by GazetaBitcoin, it's really important to customize your topic for your local board.
You can add many points, where your local board needs to improve posting quaility, how to avoid common mistakes etc.
As an inspiration, you can have a look at our topics:
Available translations: || Română (Romanian) by GazetaBitcoin || Deutsch (German) by 1miau
I hope it's working for you to read our German / Romanian version via Google translate and be able to see how we have customized our versions for our local boards.
For example: Bengali local is currently just a big topic, so it's different from German / Romanian local board. We are looking forward to your version.
If you have any question, feel free to ask here.
I've added your reservation for Bengali translation to my OP.
But I'm still not 100% happy, dear GazetaBitcoin.
Why are you still not happy?
Maybe we should hire a designer? 
A designer for the topic header?
We need to stimulate Bitcointalk economy.
Clown car? Yes, for sure it is way too small!!
For Bitcointalk, you need a whole clown bus, dear GazetaBitcoin.
And even then, we might still be in dire need of a big trailer...
For Bitcointalk, you need a whole clown bus, dear GazetaBitcoin.
And even then, we might still be in dire need of a big trailer...
Looooooooool!
I found a bus:
Too many clowns here...