Egregoros

Apple’s on-device translation doesn’t know it should ignore URLs, so you can hand it a post written entirely in Chinese with a URL at the end that is also mostly Chinese characters, which it sees as %20-type encoding, and it will be like “☹️ Sorry, I can’t automatically identify this language that’s 50% Chinese characters and 50% hexadecimal keysmash. … But my best guess is Polish.”