Just for fun, I tried signing up for https://litessl.cn/, the free Chinese ACME CA (powered by TrustAsia), using the browser translator.
After going through 4-5 captchas, one of which was unsolvable, they want to verify my phone number.
Dunno if it works if you're not Chinese, and I'm not sure I want my identity in a government cryptography database (too late), so I guess I'll give up.