WME Closure Tab Enabler is a simple script that enables the Closure tab even if you don’t match the lever requirement so you can see the closures on the selected element.
Greasyfork: https://greasyfork.org/en/scripts/40085-wme-closure-tab-enabler
Instead of coding the translations into your script, you should be able to use:
I18n.translations[I18n.locale].edit.segment.tabs.closuresThis pulls the translation option (I18n is an abbreviation of Internationalization), the I18n.locale returns the localization that is active at the moment, then the other parts are the break down of the objects.
Thanks for your suggestion! I have updated the script accordingly, now it should always work 
If you haven’t already done so, I would suggest you join the Discord Scripts Server as well. It is a great was to communicate with the people who install your scripts and talk to other script writers.
First time trying to use scripts with WME.
I got a runtime error while trying to launch the script.
I have signed up to discord if that helps, plus I left feedback where I downloaded the script.
When I run this script along with the other scripts I typically use, I don’t get an option to save after deleting a segment or a map comment.