I have setup a free SDL Language Cloud account. If I navigate to File>Language Cloud in Studio 2017 or add Language Cloud Machine Translation to a project, I see that I am automatically connected to my free account and can use the service immediately.
But, if I receive an API key from a company so that I can use the company’s Language Cloud trained engines for a specific project, I see no way to of doing so. How do enter an API key from another account, If I already have my own Language Cloud account?
You need to sign out of your Language Cloud account in Trados Studio and sign in again with the API Key.
Please see this article I have created for this process
Let me know if it works and if you need further help.