Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 475, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/pkcompat.py", line 1868, in _run_query
    kwargs=kwargs)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/pkcompat.py", line 1883, in _get_merged_trans
    trans._set_locale(self.hints["locale"])
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 785, in _set_locale
    (lang, encoding) = locale._parse_localename(str(locale_str))
  File "/usr/lib/python2.7/locale.py", line 435, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: bn_BD