[Закрытые] I need help with my website скрытая ссылка.

Background of the issue:
I am trying to set REGION / LANGUAGE in the URL for multi-language support on my website using WPML. I want to add sub-languages in the WPML language switcher and have the slug show like скрытая ссылка for Canada in English, скрытая ссылка for USA in English, скрытая ссылка for India in English, and скрытая ссылка for India in Hindi.

Symptoms:
No specific issue or error message mentioned.

Questions:
Could you please provide a solution for setting REGION / LANGUAGE in the URL for multi-language support?
Is there a way to add sub-languages in the WPML language switcher with custom slugs?