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Problem:
The client is setting up a development copy of their site and has installed WPML on the development domain. They are facing issues with WPML not recognizing the site as a development copy and are unsure how to proceed with the license key and the import/export of WPML content.
Solution:
If you're setting up a development copy of your site and need to manage WPML's license and content, follow these steps:
1. Generate a new site key for the development domain by visiting https://wpml.org/account/sites. You can specify the key as 'Development' during this process.
2. To duplicate your site, consider using the 'Duplicator' plugin. Documentation and a tutorial for Duplicator can be found at https://snapcreek.com/duplicator/docs/ and https://www.youtube.com/watch?v=3YDQ3Ey_2wY.
3. After migration, register WPML on your new site with the new key.
4. For manual content transfer, use the WPML Import/Export plugin. You can download and install it from https://wpml.org/download/wpml-export-and-import/?section=changelog.
5. Manually configure any custom taxonomies or language settings on the development site before importing content.

Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the issue persists, please open a new support ticket at WPML support forum.