The Machine Translation Service is not running when it should be running (SharePoint Server)
APPLIES TO: 
2013 2016 2019 Subscription Edition 
SharePoint in Microsoft 365
Rule Name: The Machine Translation Service is not running when it should be running.
Summary: The Machine Translation Service batch mode uses a timer job to pull translation items from the Machine Translation Service database and then assign those translation items to individual application servers. If the timer job doesn't run, items can't be translated.
Cause: The Machine Translation Service timer job isn't enabled.
Resolution: Enable the Machine Translation Service timer job.
Verify that the user account that is performing this procedure is a member of the Farm Administrators group.
On Central Administration , click Monitoring.
On the Job Definitions page, in the list of timer jobs, click Machine Translation Service Timer Job.
On the Edit Timer Job page, in the Recurring Schedule section, specify when you want the timer job to run, and then click Enable.
The default is every 15 minutes.
See also
Concepts
Default timer jobs in SharePoint Server 2019