if (ComponentUtil.getFessConfig().isOnlineHelpSupportedLang(lang)) {
                target = lang.toUpperCase(Locale.ROOT);
            }
        }
        return url.replaceFirst("\\{lang\\}", target == null ? "EN" : target);
    }

    /**
     * Gets the help link for a specific page.
     *
     * @param name The name of the help page.
     * @return The help link.
     */