Hi llribas,
I understand that the WPML translator thing can be an easier approach, but unfortunately, there is no compatibility with that feature at the time being. The reason is it needs fundamental changes of both how Cornerstone/Pro saves the meta information and how the WPML detects the content of the page.
At the moment I do not have any solutions for you except to use the Flags that my colleague already mentioned. The thing is that you can use the flag inside the editor then you can decide to create the translated page from scratch or duplicate that. By duplicating you will have the same layout and can translate.
I do understand that if you want to change the layout later, you will need to do it for all languages.
Thank you for your understanding.