public static function _x($text, $context, $domain = null)
 {
     if (!$domain) {
         $domain = Core::ID;
     }
     return \translate_with_gettext_context($text, $context, $domain);
 }

/**
 * Translates role name. Since the role names are in the database and
 * not in the source there are dummy gettext calls to get them into the POT
 * file and this function properly translates them back.
 *
 * The before_last_bar() call is needed, because older installs keep the roles
 * using the old context format: 'Role name|User role' and just skipping the
 * content after the last bar is easier than fixing them in the DB. New installs
 * won't suffer from that problem.
 */
function translate_user_role($name)
{
    return translate_with_gettext_context(before_last_bar($name), 'User role');
}

<?php

/**
 * A set of WordPress translation functions.
 *
 * @see wp-includes/l10n.php
 */
translate('translate');
translate_with_gettext_context('translate_with_gettext_context', 'translate_with_gettext_context-context');
__('__');
esc_attr__('esc_attr__');
esc_html__('esc_html__');
_e('_e');
esc_attr_e('esc_attr_e');
esc_html_e('esc_html_e');
_x('_x', '_x-context');
_ex('_ex', '_ex-context');
esc_attr_x('esc_attr_x', 'esc_attr_x-context');
esc_html_x('esc_html_x', 'esc_html_x-context');
_n('_n-single', '_n-plural', 2);
_nx('_nx-single', '_nx-plural', 2, '_nx-context');
_n_noop('_n_noop-singular', '_n_noop-plural');
_nx_noop('_nx_noop-singular', '_nx_noop-plural', '_nx_noop-context');

/**
 * __x
 *
 * @param string $text Text to translate.
 * @param string $context Context information for the translators.
 * @param string $domain Optional. Text domain. Unique identifier for retrieving translated 
 * @return string Translated context string without pipe.
 * @version 1.0.1
 */
function __x($text, $context, $domain = null)
{
    if (!$domain) {
        $domain = theme_functions::$iden;
    }
    return translate_with_gettext_context($text, $context, $domain);
}

 /**
  * Shopp wrapper for gettext translation strings (with optional context and Markdown support)
  *
  * @author Jonathan Davis
  * @since 1.3
  *
  * @param string $text The text to translate
  * @param string $context An explination of how and where the text is used
  * @return string The translated text
  **/
 public static function translate($text, $context = null)
 {
     $domain = 'Shopp';
     if (is_null($context)) {
         $string = translate($text, $domain);
     } else {
         $string = translate_with_gettext_context($text, $context, $domain);
     }
     return $string;
 }

 function _x($single, $context, $domain = 'default')
 {
     return translate_with_gettext_context($single, $context, $domain);
 }

function wpdev_141551_translate_user_roles($translations, $text, $context, $domain)
{
    $plugin_domain = 'learn_press';
    $roles = array('Instructor');
    if ($context === 'User role' && in_array($text, $roles) && $domain !== $plugin_domain) {
        return translate_with_gettext_context($text, $context, $plugin_domain);
    }
    return $translations;
}

        public function ping_settings_field()
        {
            $options = parent::get_ping();
            $defaults = parent::defaults('ping');
            $update_services = get_option('ping_sites');
            $prefix = parent::prefix();
            $names = array('google' => array('name' => __('Google', 'xml-sitemap-feed')), 'bing' => array('name' => __('Bing & Yahoo', 'xml-sitemap-feed')), 'yandex' => array('name' => __('Yandex', 'xml-sitemap-feed')), 'baidu' => array('name' => __('Baidu', 'xml-sitemap-feed')), 'others' => array('name' => __('Ping-O-Matic', 'xml-sitemap-feed')));
            foreach ($names as $key => $values) {
                if (array_key_exists($key, $defaults) && is_array($values)) {
                    $defaults[$key] += $values;
                }
            }
            echo '
		<fieldset id="xmlsf_ping"><legend class="screen-reader-text">' . translate('Update Services') . '</legend>
			';
            foreach ($defaults as $key => $values) {
                if (isset($values['type']) && $values['type'] == 'RPC') {
                    $active = strpos($update_services, untrailingslashit($values['uri'])) === false ? false : true;
                } else {
                    $active = !empty($options[$key]['active']) ? true : false;
                }
                echo '
				<label><input type="checkbox" name="' . $prefix . 'ping[' . $key . '][active]" id="xmlsf_ping_' . $key . '" value="1"' . checked($active, true, false) . ' /> ';
                echo isset($names[$key]) && !empty($names[$key]['name']) ? $names[$key]['name'] : $key;
                echo '</label>';
                echo '
				<input type="hidden" name="' . $prefix . 'ping[' . $key . '][uri]" value="' . $values['uri'] . '" />';
                echo '
				<input type="hidden" name="' . $prefix . 'ping[' . $key . '][type]" value="' . $values['type'] . '" />';
                if (isset($values['news'])) {
                    echo '
				<input type="hidden" name="' . $prefix . 'ping[' . $key . '][news]" value="' . $values['news'] . '" />';
                }
                echo ' <span class="description">';
                if (!empty($options[$key]['pong'])) {
                    if ($tzstring = get_option('timezone_string')) {
                        // use same timezoneformat as translatable examples in options-general.php
                        $timezone_format = translate_with_gettext_context('Y-m-d G:i:s', 'timezone date format');
                        date_default_timezone_set($tzstring);
                    } else {
                        $timezone_format = 'Y-m-d G:i:s T';
                    }
                    foreach ((array) $options[$key]['pong'] as $pretty => $time) {
                        echo '
						<input type="hidden" name="' . $prefix . 'ping[' . $key . '][pong][' . $pretty . ']" value="' . $time . '" />';
                        if (!empty($time)) {
                            echo sprintf(__('Successfully sent %1$s on %2$s.', 'xml-sitemap-feed'), $pretty, date($timezone_format, $time)) . ' ';
                        }
                    }
                    date_default_timezone_set('UTC');
                }
                echo '</span><br>';
            }
            echo '
		</fieldset>';
        }

 function esc_attr_x($single, $context, $domain = 'default')
 {
     return esc_attr(translate_with_gettext_context($single, $context, $domain));
 }

/**
 * Shortcut for the esc_html_x function
 * @param string $text
 * @param string $domain
 */
function esc_html_x_emp($text, $context, $domain = 'dbem')
{
    return esc_html(translate_with_gettext_context($text, $context, $domain));
}

 /**
  * Shortcode inside post content
  * [linked-post-in lang="fr_fr"]Voir cet article[/linked-post-in]
  *
  */
 function build_linked_posts_shortcode($atts, $content = null)
 {
     global $post;
     extract(shortcode_atts(array('lang' => '', 'title' => '', 'context' => 'linktitle'), $atts));
     $language = xiliml_get_language($lang);
     /* test if lang is available */
     if ($language !== false) {
         $otherpost = $this->linked_post_in($post->ID, $language->slug);
     }
     if ($otherpost) {
         if ('' == $title) {
             $obj_lang = xiliml_get_lang_object_of_post($otherpost);
             if (false !== $obj_lang) {
                 $description = $obj_lang->description;
                 if ($context) {
                     $text_title = translate_with_gettext_context('A similar post in %s', $context, $this->thetextdomain);
                     $language_name = translate_with_gettext_context($description, $context, $this->thetextdomain);
                 } else {
                     $text_title = translate('A similar post in %s', $this->thetextdomain);
                     $language_name = translate($description, $this->thetextdomain);
                 }
                 $title = esc_html(sprintf($text_title, $language_name));
             } else {
                 $title = esc_html(__('Error with target post #', 'xili-language')) . $otherpost;
             }
         }
         $output = '<a href="' . get_permalink($otherpost) . '" title="' . $title . '">' . $content . '</a>';
         /* this link above can be enriched by image or flag inside $content */
     } else {
         $output = '<a href="#" title="' . __('Error: other post not present !!!', 'xili-language') . '">' . $content . '</a>';
     }
     return $output;
 }