I am building a site for a client and we want to upgrade to the PRO version. The site will be multilingual but because of some other issues we have to do it by way of two separate WP installations. From the users/front end perspective it is all just one site in two languages but the backend is two WP admins. Does that require us to get two licenses?
Generally speaking you should have a license for each separate WordPress installation. However, in a situation like this one if you are happy to take care of manually updating one of those sites and they are essentially anyway the same site we don’t have any real objection to you using just one license.