LocalizationKey enum with parameters

LocalizationKeyEnumParameters.swift

enum LocalizationKey {
    case hello
    case bye(String)
    case progress(Int, Int)

    var string: String {
        switch self {
        case .hello:
            return "hello".localized()
        case .bye(let name):
            return String(format: "bye".localized(), name)
        case .progress(let from, let to):
            return String(format: "progress".localized(), from, to)
        }
    }
}