I suppose the best username system is the one that works for your use case, but I can't help but feel like the alphanumeric system isn't ideal for users of coun

I suppose the best username system is the one that works for your use case, but I can't help but feel like the alphanumeric system isn't ideal for users of countries that don't primarily use the latin alphabet. I realize that the world has adapted to the demands imposed by the internet (for example Chinese users often employing strings of numbers as their username) but I wonder if something like NFKC unicode normalization would be a better solution for a global audience.