Internationalized Domain Name and Minceraft Servers

Hi, I had found out that there are domains in different languages a few months ago and I was wondering why it doesn't seem to work in Minecraft. I purchased a couple of domains to see if they would work with different combinations, but none of them seemed to function well. At first I bought some generic full chinese characters domain to test it. Lets say for example 汉字.中国. This didn't seem to work when connecting to my server. But if I typed it out how it shows up on the domain website with ex. xn--p8s370b.xn--fiqs8s it would then work. I then bought a domain with just a chinese characters first part so for example 汉字.com and that didn't seem to work either so I then bought one that was like Server.中国 and this didn't work either. Why is that Minecraft servers only seem to work with punycode? Thank you for taking the time to read this, have a good day! Also I haven't tested it out with newer versions of MC(the version I used was 1.8.8 server) but I doubt it will work anyways.