Delete a translation set at any time by clicking on the trash can icon next to the translation set you want to delete.
When you delete a translation set that is in use, Studio uses the default translation set for any apps or sites using the deleted translation set.
You can delete a translation set that a network, a site, or an app is using. Studio notifies you that the translation set is being used, but still allows you to delete the translation set. Once you delete a translation set it cannot be recovered.