Language system

Lang.java

public class Lang {
    public static String CLASS_ARCHER = "Archer";
    public static String CLASS_ASSASSIN = "Assassin";
    public static String CLASS_MAGE = "Mage";
    public static String CLASS_NOT_PICKED = "&cYou need to select a class!";
    public static String CLASS_WARRIOR = "Warrior";
    public static String COMMAND_CLASS_CANNOT_CHANGE = "&cYou cannot change your class!";
    public static String COMMAND_CLASS_CHOSEN = "&7You have chosen the &e%s&7 class.";
    public static String COMMAND_CLASS_NOT_FOUND = "&cThe specified class does not exist!";
    public static String COMMAND_CLASS_VIEW = "&7Your class is &e%s&7.";
    public static String COMMAND_SKILL_VIEW = "&7You have &e%s &7point%s.";
    public static String COMMAND_SYNTAX = "&7Command Syntax: /%s";
    public static String GENERAL_PREFIX = "&8[&3Classes&8] &7";

    public static String formulate(String message, Object... vars) {
        return ChatColor.translateAlternateColorCodes('&', Lang.GENERAL_PREFIX + String.format(message, vars));
    }

    public static String formulateConsole(String message, Object... vars) {
        return ChatColor.stripColor(Lang.GENERAL_PREFIX + String.format(message, vars)).replaceAll("[^\\x00-\\x7f]", "").trim().replaceAll(" +", " ");
    }

    public static String formulateRaw(String message, Object... vars) {
        return ChatColor.translateAlternateColorCodes('&', String.format(message, vars));
    }

    public static void load() throws IllegalAccessException, NoSuchFieldException, IOException {
        YamlConfiguration config = ConfigHandler.getConfig(ConfigHandler.ConfigType.LANG);

        Lang messageInstance = new Lang();
        for (Field field : messageInstance.getClass().getFields()) {
            if (!config.contains(field.getName())) {
                config.set(field.getName(), field.get(messageInstance.getClass()));
            }
        }

        for (String message : config.getKeys(false)) {
            try {
                Field field = Lang.class.getDeclaredField(message);
                field.setAccessible(true);
                field.set(null, config.getString(message));
            } catch (NoSuchFieldException ex) {
                config.set(message, null);
                config.save(ConfigHandler.getFile(ConfigHandler.ConfigType.LANG));
            }
        }

        try {
            config.save(ConfigHandler.getFile(ConfigHandler.ConfigType.LANG));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}