.htaccess : Loads a directory by default - php

Question

I have to upload a directory by default when someone comes to my static website
this is the structure
under my public_html I have domain folder 'domainname'. In domain folder I've webfolder/fr/index.html
I want to load files under webfolder/fr directly. following is my .htaccess under the domain name
RewriteEngine on
RewriteCond %{HTTP_HOST} ^domainname$ [NC,OR]
RewriteCond %{HTTP_HOST} ^domainname$
RewriteCond %{REQUEST_URI} !webfolder/fr/
RewriteRule (.*) /en/$1 [L]
if I remove fr/index.html it loads files under webfolder. If I set
RewriteCond %{REQUEST_URI} !webfolder/fr/
it gives 500 internal error.
Please help me how can I fix this.
To Clarify:
When I open my domain www.domain.com I want it to open www.domain.com/webfolder/fr

Answer 1

Please add following two lines to allow a specific file to load just in case there is no default index file setup already
Options -Indexes
DirectoryIndex index.html index.php
Note : if you have to load first php index file then you have set like
DirectoryIndex index.php index.html

Answer 2

So you want to redirect your domain from root folder to some other subfolder
try this code
RewriteEngine on
RewriteCond %{HTTP_HOST} ^domainname$ [NC,OR]
RewriteCond %{HTTP_HOST} ^domainname$
RewriteCond %{REQUEST_URI} ^/$
RewriteRule (.*) /webfolder/fr [L]
hope this code will work for you
optional:-you can also do this by changing your home directory in cpanel settings