Internationalized Domain Names (IDNs) are domain names that contain non-ASCII characters. For example, the domain bücher.ch is an IDN because it has the character ü.
ServerPilot fully supports IDNs. To use IDNs with your apps in ServerPilot, you must use the Punycode version of the domain name, which is a way of representing the IDN using only ASCII characters. For example, the Punycode representation of bücher.ch is xn--bcher-kva.ch.
If you don't know the punycode version of your IDN domain, you can find it using a Punycode converter.