UITextChecker for Set of Strings - Swift 4.2

Question

I currently have this Extension thanks to @Leo Dabus. It works perfectly for a single String, but how would I implement this same logic to an Set of Strings like var mySet = ["word", "notaword", "stillnotaword"]. In this example, I would want the function to only identify the first index as true (i.e. an English word).

extension String {
    public mutating func isEnglishWord() -> Bool {
        return UITextChecker().rangeOfMisspelledWord(in: self, range: NSRange(location: 0, length: utf16.count), startingAt: 0, wrap: false, language: "en_US").location == NSNotFound
    }
}

var myString = "word"

myString.isEnglishWord()

Answer 1

let words = ["word", "notaword", "stillnotaword"]

let validWords = words.filter { word -> Bool in
    return word.isEnglishWord()
}

let wordsArray : NSArray = NSArray(array: words)
let validWordsIndexes = wordsArray.indexesOfObjects { (word, index, _) -> Bool in
    return (word as! String).isEnglishWord()
}

print(validWords)
print(validWordsIndexes)

extension String {
    public func isEnglishWord() -> Bool {
        return UITextChecker().rangeOfMisspelledWord(in: self, range: NSRange(location: 0, length: utf16.count), startingAt: 0, wrap: false, language: "en_US").location == NSNotFound
    }
}

I have added the code to print valid words and indexes of valid words. You can choose which ever suits you. Thanks