I need to change website domain from www.domain.com to www.newdomain.com/en but I also need to specify some pages from old website to new website like www.domain.com/page to www.newdomain.com/en/subfolder/subfolder/page.
Last thing should be great keeping one subfolder path of old website free of redirect like www.domain.com/admin in order to keep backend access to old website.
What would you suggest me to add to old site htaccess file in order to achieve that with a sort of fallback mechanism for specifc pages and whole domain to subdirectory?
Thank you