captcha-module/views/admin/en/module_options.php

<?php
/**
 * #PHPHEADER_OECAPTCHA_LICENSE_INFORMATION#
 */

// -------------------------------
// RESOURCE IDENTIFIER = STRING
// -------------------------------
$aLang = array(
    'charset'                  => 'UTF-8',
    'SHOP_MODULE_GROUP_main'   => 'General',
    'SHOP_MODULE_oecaptchakey' => 'Captcha Key',
);