func wordIsSpelledCorrect(_ word: String) -> Bool {
    let checker = UITextChecker()
    let range = NSMakeRange(0, word.characters.count)
    let wordRange = checker.rangeOfMisspelledWord(in: word, range: range, startingAt: 0, wrap: false, language: "en")
    return wordRange.location == NSNotFound



}

if wordIsSpelledCorrect((yourTextField.text)!){