htaccess rewrite virtual folder - apache

Question

im trying to create website, and i need to rewrite php file switch cases to virtual directories.
Im trying to make url of type http://localhost/en/dashboard/mailbox/send/username
to work, and its working with the following code
RewriteEngine On
RewriteCond %{REQUEST_URI} ^(.*)//(.*)$
RewriteRule . %1/%2 [R=301,L]
RewriteCond %{HTTP:Accept-Language} ^([a-z]{2})- [NC]
## Rewrite Rules
RewriteRule ^/?$ /%1/%{REQUEST_URI} [L,NC,R]
RewriteRule ^([a-z]{2})/?$ /index.php?language=$1 [L,NC,QSA]
RewriteRule ^account/?$ /%1%{REQUEST_URI} [L,NC,R]
RewriteRule ^([a-z]{2})/(account)(?:/([^/]+)(?:/([^/]+))?)?/?$ account.php?language=$1&action=$3 [L,NC]
RewriteRule ^dashboard/?$ /%1%{REQUEST_URI} [L,NC,R]
RewriteRule ^([a-z]{2})/(dashboard)(?:/([^/]+)(?:/([^/]+))(?:/([^/]+))?)?/?$ /$2.php?language=$1&type=$3&subtype=$4&lasttype=$5 [L,NC,QSA]
However, from now i cannot access http://localhost/en/dashboard/mailbox/ itself
Can someone help me to solve this problem?
Im not into this htaccess thing at all, but i did so far all i could (i think so)

Answer 1

Thanks to #hjpotter92, this problem was solved.
I missed one question mark, so thats why this code was kind of broken.
Here is correct string:
^([a-z]{2})/(dashboard)(?:/([^/]+)(?:/([^/]+))?(?:/([^/]+))?)?/?$
All i missed is
^([a-z]{2})/(dashboard)(?:/([^/]+)(?:/([^/]+))?(?:/([^/]+))?)?/?$
And here is fully correct code
RewriteEngine On
RewriteCond %{REQUEST_URI} ^(.*)//(.*)$
RewriteRule . %1/%2 [R=301,L]
RewriteCond %{HTTP:Accept-Language} ^([a-z]{2})- [NC]
## Rewrite Rules
RewriteRule ^/?$ /%1/%{REQUEST_URI} [L,NC,R]
RewriteRule ^([a-z]{2})/?$ /index.php?language=$1 [L,NC,QSA]
RewriteRule ^account/?$ /%1%{REQUEST_URI} [L,NC,R]
RewriteRule ^([a-z]{2})/(account)(?:/([^/]+)(?:/([^/]+))?)?/?$ account.php?language=$1&action=$3 [L,NC]
RewriteRule ^dashboard/?$ /%1%{REQUEST_URI} [L,NC,R]
RewriteRule ^([a-z]{2})/(dashboard)(?:/([^/]+)(?:/([^/]+))?(?:/([^/]+))?)?/?$ /$2.php?language=$1&type=$3&subtype=$4&lasttype=$5 [L,NC,QSA]