public class Option {
    public static void main(String[] args) {
        boolean isError = false;

        if (args != null && args.length > 0 && args[0] != null) {
            switch (args[0]) {
                case "-en":
                    System.out.println("English Language");
                    break;
                case "-ru":
                    System.out.println("Russian Language");
                    break;
                default:
                    isError = true;
                    break;
            }
        } else {
            isError = true;
        }

        if (isError) {
            System.out.println("Error! Check your arguments and try again.");
            System.out.println("Avalibale arguments:");
            System.out.println("-en Sample text on English");
            System.out.println("-ru Sample text on Russian");
        }
    }
}