While exploring machine translation service in SharePoint 2013 I got the issue saying that “immediate translations for machine translation service are disabled”. In SharePoint 2013, many features are depending on the machine translation service synchronous mode. If immediate translations disabled in the machine translation service all those features will not function as expected.
To enable synchronous translations in machine translation service,
In SharePoint Central Administration select Manage Service Applications in Application Management section.
Click on Machine translation service in the service application list.
In “Maximum number of synchronous translation requests (per server)” text box in “Maximum Synchronous Translation Requests” section, enter the values from 1-300. If the value is “0”, then the synchronous transactions are disabled.