I'm a WordPress Core Bengali translator, currently translating and/or fixing existing translations of WordPress 3.8x Bengali in Translate.WordPress.org.
Suddenly, yesterday I got an update notification in all my
bn_BD' sites that, a new version of WordPress Bengali for WordPress 3.9 has come, so update your system. After the update I found a bluff update, because all the previous strings those were translated, got untranslated strings now. So, it's a bogus translation at all.
As a Core translator, I jumped to the translate.wordpress.org's WordPress Projects, but found no such 3.9x translation project there.
I wonder, from Where the official language release just happened, (as v3.9 is NOT a Dev. version now, it's a released one) if there's no such project's running!?