Is it possible to rename the Discussion section? Or any of the other main sections for that matter?
Hope you are well,
I have looked in to this for you and at this moment in time it is not possible to change the menu options, as these are hard coded in to the system.
I will ask if it is possible in the future to make these fields editable.
This would take a bit of developing on your end, but it is a possibility so I thought I would mention it. If you are interested, here is a link to our wiki:
Custom Header & Footer
Hopefully this information is helpful. Please let us know if you have any questions.