[مغلق] Changing the default language of pages and pop ups

Background of the issue:
I've built a few pages in English and a few in Spanish on my site الرابط المخفي. I want to change the default language of pages and pop-ups. I am trying to make the Spanish version of a page the 'parent' and the English version the 'child'.

Symptoms:
When I go to edit a page I built in one language while I'm in the other language, it causes issues.

Questions:
Is there a way to make the Spanish version of a page the 'parent' and the English version the 'child'?