How to define domains properly

This may also be related to https://www.drupal.org/project/external_link_popup/issues/3349854 ✨ External link popup not working for subdomain like http://www.xyx.com/my-en Needs review

Can this module do the following? And if so, what pattern would work under Domains?

Goal is to show the popup when visitor follows either:

• same primary domain but different country
• true external link

For example:

Trigger pop-up:

domain.com/en/country1/pagename1 => domain.com/en/country2/pagename1

domain.com/en/country1/pagename1 => domain.com/en/country2/pagename2

( if countryX is different, show pop-up )

Ignore language prefix added to URL, instead use Country in URL to trigger pop-up

These scenarios would NOT trigger pop-up

domain.com/en/country1/pagename1 => domain.com/de/country1/pagename1

domain.com/en/country1/pagename1 => domain.com/de/country1/pagename2