Map of where Bengali is spoken in the world.
<a href="//commons.wikimedia.org/wiki/User:Ms2ger" title="User:Ms2ger">Ms2ger</a>
self-made, based on <a href="//commons.wikimedia.org/wiki/File:BlankMap-World6.svg" class="mw-redirect" title="File:BlankMap-World6.svg">Image:BlankMap-World6.svg</a> and <a href="//commons.wikimedia.org/wiki/File:Bengali_world1.jpg" title="File:Bengali world1.jpg">Image:Bengali world1.jpg</a>. Data based on <a href="https://en.wikipedia.org/wiki/Bangladeshi_diaspora" class="extiw" title="en:Bangladeshi diaspora">this article</a> and from <a rel="nofollow" class="external text" href="http://siteresources.worldbank.org/INTPROSPECTS/Resources/334934-1110315015165/Islam.pdf">this</a>.