two domains two languages
RewriteEngine on
RewriteCond %{SERVER_NAME} site\.sp$ [NC]
RewriteCond %{REQUEST_URI} ^/$ [NC]
RewriteRule .* ?language=spain [QSA]
RewriteCond %{SERVER_NAME} site\.com$ [NC]
RewriteCond %{REQUEST_URI} ^/$ [NC]
RewriteRule .* ?language=english [QSA]