Use of IDN Domains

Hi

I’m trying to learn some more about the concept of Internationalized Domain Namens (IDN) and would like to understand the limitations of WordPress on that matter. I am actually using an umlaut domain. The name of the domain is hannah-h?ch-schule.de which works fine if you enter that name in any current browser. The domain, however, is registered as https://www.xn--hannah-hch-schule-6zb.de which is a rather ugly name. That name should be translated into the umlaut domain and vice versa.

Unfortunately, there are still some programs that are not aware of internationalized domain names and I have the feeling that WordPress may have some issues with IDN as well.

In the settings dialogue of wordpress an umlaut domain is not accepted as a valid domain name. So I am forced to enter the ugly registered domain name. That in turn causes the ugly name to appear in the permalinks.

Does anybody have similar experiences and found a way around this? And if not, with the rising number of IDN, would it be worth to consider proper IDN handling as a feature request for an upcoming version?

And since we are into it: If I decide to change to a “standard” domain name, and buy another domain name that points to the same directory, can I simply change the domain name in the settings dialogue of WP or will that ruin existing posts in some way?

Thanks for your help.

Best regards,

Jens