Have you ever actually tried it? Simple example: Try using an emoji for an assignment: ⭐=foo or foo=⭐

It doesn't work? Why? Because emojis aren't valid for assignments. Why? Because Python follows Unicode Standard Annex #31 (UAX #31). Since emoji are classified as symbols, you can't use them for assignments.

Who cares? We're taking Mandarin, right? Except there's a practical problem: The most common input method for typing Mandarin (and other languages with bazillions of characters) outputs full-width characters (e.g. ＝ full width equal sign) and this screws everything up. It does this for equals, parentheses, commas, and a few other symbols.

My friend said that was the most annoying thing: Having to constantly switch back and forth.

However, many characters that are used as normal words also don't work for assignments. For example, Chinese numerals: 一, 二, 三 (the English equivalent of, one, two, three)

Then there's a practical problem: It looks wacky AF, making the code harder to read:

if 用户.is_active():
    return 获取数据()

The input method editor problem is the biggest one because it really slows you down. Having to switch in and out of it constantly also creates huge friction when coding.

I just asked him and he just gave me something I didn't even think about: Apparently git diffs (on the command line) don't display Mandarin characters properly! That right there would make programming in Mandarin a no-go situation without a special git tool.

Apparently, if you want to be able to deploy your code at all you have to know English. Or at least, Linux English (e.g. ls and similar programs haha).