Whats the best method?
 

Hi guys,

Maybe someone can help me...

I have a site with multi-language using subdomains like es.domain.com, it.domain.com, etc...
I also have the same site in french but in a different domain.
My idea is to move this french site on domain2.com to fr.domain.com

My only concern is about the same layout and content, don't want to be penalized by google for this. That's why the idea to move to subdomain like the others.

Whats the best method to do this?
Redirect all my visitors through htaccess using 301 redirect!?

Something like this on htaccess of domain2.com?

How about the backlinks that already have?
Is better to contact the webmasters to change them to new url since I don't want to renew that domain anymore?

Thank you guys!