The translate application is meant to be deployed as an embeddable application. This means you would set up the node.js app on a server you were running in your own data center and then expose the HTTP endpoint to Genesys cloud. It does not require a node.js instance to be sent for each agent.
I would carefully review each of the steps you are doing because usually the translate icon is missing if you are missing even one step. We pinged the internal dev who wrote the blueprint so when she comes back online hopefully she will take a look at it.
Please keep in mind that this blueprint is meant to be a reference implementation that demonstrates the art of the possible and is not a production-ready application. You will need to review and modify the application as needed to meet your organization's security and SLA requirements. This example is not part of the core Genesys Cloud product suite and does not have any type of SLAs or guarantees around the code.
Thanks,
John Carnell
Director, Developer Engagement