RewriteRule ^(?:(website|planning)/)?([a-zA-Z\_\-]+)/?$ /index.php?section=$1&module=$2&command=index&command_type=view [QSA]

RewriteRule ^(?:(website|planning)/)?/([a-zA-Z\_\-]+)/([a-zA-Z\-]+)/?$ /index.php?section=$1&module=$2&command=$3&command_type=view [QSA]

Works: /account/
Does not work: /account/register/