Enables multilingual support for variables defined in a group.

translate_variable.php

<?php

/**
 * Enables multilingual support for variables defined in a group.
 * 
 * @param string $group
 *   The group of variables to load
 */
function enable_multilingual_variables($group) {
  // Load all the variables defined by group.
  $variables = variable_list_group($group);

  // Enable multilingual support adding those variables to Language realm.
  $variable_names = array_keys($variables);
  $controller = variable_realm_controller('language');
  $controller->setRealmVariable('list', $variable_names);

  // Set default value as English translation to avoid inconsistencies.
  foreach ($variables as $name => $variable) {
    variable_realm_set('language', 'en', $name, $variable['default']);
  }
}

/**
 * Translates variables given an name-value array.
 * 
 * @param array $variables
 *   Array containing translations keyed by variable name.
 * @param string $language
 *   Language code of the translated variables.
 */
function translate_variables($variables, $language) {
  // Enable multilingual support adding those variables to Language realm.
  $variable_names = array_keys($variables);
  $controller = variable_realm_controller('language');
  $controller->setRealmVariable('list', $variable_names);

  // Set default value as English translation to avoid inconsistencies.
  foreach ($variables as $name => $variable) {
    $info = variable_get_info($name);
    variable_realm_set('language', 'en', $name, $info['default']);
  }

  // Add the translation.
  foreach ($variables as $name => $variable) {
    variable_realm_set('language', $language, $name, $variable);
  }
}