this news item on the German Deutsche Welle in the Bengali language. I cannot make head or tail out of it.
The logo depicted in the article is the logo of the English Wikipedia. Obvious really because it started this whole Wikipedia ten years ago.
Recently the input methods for Bengali have been much improved; there are three input methods available; Avro InScript and NKB. This makes it easier for people to edit in Bengali.
This improvement is currently only available on the Bengali projects and consequently it is not a MediaWiki improvement. Commons would benefit from the same improvements and so would any other project where people edit in Bengali.
I hope that such usability improvements will find their way in the core MediaWiki product because it is essential for the usability of the Bengali localisation.