1. To get a IBM Watson Translator API key, you need to sign up for IBM cloud account at here:- https://cloud.ibm.com/registration
2. After sign up, visit:- https://cloud.ibm.com/catalog and search translate inside top search box.
3. Now select free plan and activate translator service.
4. Now visit resources tab – https://cloud.ibm.com/resources and select translator service activated in last step.
5. Copy the API key & API URL and enter both inside plugin settings.