Actually, the mapping process is only done from our system (translation proxy), but if you are installing a whole new website, you can set the Spanish language code as es-419 from the beginning to avoid doing the mapping, but if the website is already installed and the languages already have been set, we do the mapping on the project to bridge this issue.
So if you need another mapping please provide me with the URL of the website you registered WPML with, and I will do it for you.
Please open a new ticket if you have any other issues or requests to be able to track the issues.
Kindly be informed that the mapping is already done previously to hidden link, but I can't find any project with the URL "hidden link" so are you sure that the website is registering WPML and connected to a translation service.