[تم الحل] Force different language per domain to accept domain with slashes

Background of the issue:
I need to force the second language to accept a domain in the format الرابط المخفي. I am trying to achieve a fully integrated development site with exactly the same setup as the main site, which includes different language per domain.

Symptoms:
No specific issue or error message mentioned.

Questions:
How can I force the second language to accept a domain with slashes in WPML?
Is it possible to set up different languages per domain in the format الرابط المخفي?