Not yet, I believe. In fact what I believe Q2A must concern first to support all country languages than riginal language.
Still check here http://www.question2answer.org/addons.php?old=1#languages-old
However you can create your own language pack.
yes. now the bangla language pack is available for download. you may try it from this link
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April 20, 2021: Q2A 1.8.6 released!