Dispatcher redirect rule | Multiple languages in header

Hi Folks,

I need to define redirect rule to handle where one set of languages to redirect to site.com/en.html while other set of languages to redirect to site.com/fr.html

for example cn, de, fr to redirect site.com/en.html

while 

it, ja, zh to redirect site.com/fr.html.

How can I define such rule?

Is it possible like?

RewriteCond %{HTTP:Accept-Language} cn,de,fr [NC]
RewriteCond %{HTTP_HOST} site.com/en [NC]

RewriteCond %{HTTP:Accept-Language} it,ja,zh[NC]
RewriteCond %{HTTP_HOST} site.com/fr[NC]

Any help is highly appreciated.

Thanks,

Pradeep