[Resolved] Problems using machine translation with development key

Problem:
You are trying to use the same WPML development key on different machines using the same local address (https://localhost), but you are unable to do so without re-registering each site with a new key.
Solution:
Each WPML installation requires a unique site key and a unique site URL for registration. We recommend using the software Local to set up local domains, such as

http://sitename.local

, which allows each development environment to have its own unique URL. This setup will enable you to use a separate development key for each instance without needing to re-register under the same address. You can download and learn more about Local at https://localwp.com/.

If this solution does not apply to your case, or if it seems outdated, please check the related known issues at https://wpml.org/known-issues/, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. We highly recommend opening a new support ticket if you need further assistance. You can do so at WPML support forum.