Since apple has added the "no opt out" automatic completion of some words in the iphone keyboard, pr at least in the latest version of IOS 17.5.1 many users that try to use the portuguese word "vou" that means "going" ar suffering from constant replacing of the word to "vouch" even with the keyboard and phone language set to portuguese and autofill turned off.
There no API control over this behaviour, so there’s not much we can do for you here on the Apple Developer Forums, where our focus is on APIs. My advice is that you file a bug about this.
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"