https://thenextweb.com/contributors/2018/07/15/the-web-alienates-non-english-speakers-and-we-need-to-change-that/

Imagine you are trying to buy something online — plane tickets, an app subscription, a pair of sneakers. If you are an English speaker with an email address ending in .com, .org, .edu or .net, that process probably goes pretty smoothly for you.

But if your email address ends in .世界 or @डाटामेल.भारत or .photography, you might get an error message and be unable to complete your transaction. In this case, you have fallen victim to a lack of Universal Acceptance (UA).