Status Select Field, workflow states, Translation

I’ve added new statuses at Leave application status feild.
[Open,Approved,Reject,Approved By Department Manager]

at file I added the following

DocType: Leave Application,Approved By Department Manager,تم الموافقة من رئيس القسم

it translated sucessfully in the same Doctype.

Now i want to use the same word in another doctype, should I duplicate the same line?

No, when you run bench build-message-files it adds only one time each string, even if it is used in several files or doctypes.