domain.ru/ru/ -> domain.com/ru/
domain.ru/en/ -> domain.com/en/
domain.ru -> domain.com/ru/
<VirtualHost *:80>
ServerName domain.ru
Redirect /ru/ http://domain.com/ru/
Redirect /en/ http://domain.com/en/
Redirect / http://domain.com/ru/
</VirtualHost>domain.com -> domain.com/en/
<VirtualHost *:80>
ServerName domain.com
RewriteEngine On
RewriteCond %{REQUEST_URI} !/ru/
RewriteCond %{REQUEST_URI} !/en/
RewriteRule ^(.*)$ /en$1 [R=301,L]
</VirtualHost>