Change original language in "Translate AddToAny Settings"

Problem/Motivation

I've been stuck with some translation problems.

I'm on page "Translations for AddToAny Settings" and recently I changed my default language from Spanish to English. This is the:
admin/config/services/addtoany/translate

Now I see that "Español (original)" but I need to change this "English (original)". I think this is possible from the database, but it's not the best option.

Steps to reproduce

Install Add to any
Choose Spanish as the original language.
Create translation for add to any settings.
Change the original language to English.
Here: admin/config/services/addtoany/translate original language stays Spanish and I can't change with edit

Proposed resolution

Provide the field to choose the language from a select list.