Users can't redefine email notification variables for different languages

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 7.0.0 M6
• Fix Version/s: 7.0.0 M6
• Component/s: Content Display Widgets > Language widget
• Labels: None
• Fix Priority: 3

Steps to reproduce:

1. Navigate to Admin > Content > Web Content
2. Go to the portlet Cog > Configuration > any email tab
3. Change the Subject and Body to a different language flag
   • The fields go null, but the variables are still defined in English on the bottom

Expected result:
The variable definitions will go null, or become editable in some way.

Actual result:
They're hard-coded and untranslatable. See also LPS-55852.