Sorry, no idea.
Check if the lua API files I linked have some event or API function for this.
Or try Scootworks event mentioned above.
If this does not help: Build a table with multilanguage boss names and use it.
Or check if there is a library like libBosses already which helps and did build the table already for you?
e.g.
https://www.esoui.com/downloads/info...BossFight.html
This looks liek it already does what you want to do. So use it :-D