I have requirement to send email to Author when translation job completes so I have added translation job metadata usingusing below documentation but we.
We don't want the Author to enter their email idID manually while sending translation job, so we are looking for solution to update email metadata field through customization or TM plug in code.
Document Link to Add Translation Job Metadata: https://docs.sdl.com/LiveContent/content/en-US/SDL%20Web-v5/GUID-8722AF3C-696F-4909-9A0F-198235EC2EAB#docid=GUID-DD563DCE-A639-494B-994D-D3012514C852&filename=GUID-DD563DCE-A639-494B-994D-D3012514C852.xml&query=&scope=&tid=&resource=&inner_id=&addHistory=true&toc=false&eventType=lcContent.loadDocGUID-DD563DCE-A639-494B-994D-D3012514C852 https://docs.sdl.com/LiveContent/content/en-US/SDL%20Web-v5/GUID-DD563DCE-A639-494B-994D-D3012514C852