tmgmt_language_combination.module

<?php

/**
 * @file
 * Main module file for the tmgmt language combination module.
 */
use Drupal\Core\Language\LanguageManager;

/**
 * Prepares a language code list for a select form item with all languages.
 */
function tmgmt_language_combination_languages_predefined_list() {
  $predefined =& drupal_static(__FUNCTION__);
  if (!isset($predefined)) {
    $predefined = LanguageManager::getStandardLanguageList();
    foreach ($predefined as $key => $value) {

      // Include native name in output, if possible.
      if (count($value) > 1) {
        $predefined[$key] = $value[0] == $value[1] ? $value[0] : "{$value[0]} ({$value[1]})";
      }
      else {
        $predefined[$key] = $value[0];
      }
    }

    // Add custom languages that are not part of the iso.inc definition.
    $installed_languages = \Drupal::languageManager()
      ->getLanguages();
    foreach ($installed_languages as $lang => $info) {
      if (!isset($predefined[$lang])) {
        $predefined[$lang] = $info
          ->getName();
      }
    }
    asort($predefined);
  }
  return $predefined;
}