when using the German language for a Jira Instance, unlock the EPIC name field and translate it into German as "Epos-name", then we could see that the "copy issues in Epic" checkbox is missing in the clone plus screen.
When the Epic Link field alone is translated to German, we are able to see "Copy Issues in Epic" checkbox. However, when Epic name is changed, the option no longer appears on the clone plus screen.
Tested in Instance:http://dockerhost2.bobfire.com:8296/
Apologies for the inconvenience caused. We have understood the problem here and I have prioritized this appropriately in our backlog and we will analyse this further and share more updates once we have it ready for development/ fixing as part of a release.
Thanks for bringing it to our notice.
Nishanth T | Product Manager - Clone Plus for Jira