pirate-swedish.swift

extension String {
    func pirated() -> String {
        let consonants = "bcdfghjklmnpqrstvwxyz"

        return characters.map({ char -> String in
            let character = String(char)
            if consonants.contains(character.lowercased()) {
                return "\(char)o\(character.lowercased())"
            }
            return character
        }).joined()
    }
}

Hej världen prints Hohejoj vovärorloldodenon, enjoy!