translation process:
 php /var/www/html/wordpress/tools/i18n/makepot.php  wp-plugin ../../swift-membership  quickr-membership.pot 
 msgcat quickr-membership-bn_BD.po | msgfmt -o quickr-membership-bn_BD.mo -

test sequence:
1. login
2. password reset
3. free registration
4. email
5. profile update
6. paid registration