So if you impose https://www.newsrss24.com/ for US news and
https://www.newsrss24.com/it for italy
https://www.newsrss24.com/es for spain
https://www.newsrss24.com/en for England and so on, how should I set up the plugin?
perhaps it is better to direct the user directly to the reference site of the language, but I would also like to allow users to visit the whole network not only to limit them to the sub-site of their language
You can use country dropdown, by using country dropdown you can redirect any country site by clicking on any of country from dropdown
follow the below link to how set up country drop down