[مغلق] region-independant link

Background of the issue:
I am trying to improve SEO by adding a region-independent link for each language of my site. For example, the UK part of my site has 'en-GB', but I also want to add 'en' so Google knows that part of the site is valid for English-speaking visitors in general. I want to know how to do this in WPML. Here is an example for English: <link rel="alternate" href="الرابط المخفي" hreflang="en"> <link rel="alternate" href="الرابط المخفي" hreflang="en-GB">.

Symptoms:
No specific issue or error message mentioned.

Questions:
How do I add a region-independent link for each language in WPML?