Add ckeditor to term localize forms

module.php

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Add wysiwyg editor to term translation.
 */
function module_form_i18n_string_translate_page_form_alter(&$form, $form_state) {
  $keys = array_keys($form['strings']['all']);
  $first = reset($keys);

  if (strpos($first, 'taxonomy:term:') !== FALSE) {
    $groups = explode(':', $first);

    $term = taxonomy_term_load($groups[2]);

    if ($term && $term->vocabulary_machine_name == 'kkk') {
      $element = &$form['strings']['all']['taxonomy:term:' . $term->tid . ':description'];

      if (!$element['#disabled']) {
        $element['#type'] = 'text_format';
        $element['#rows'] = 10;
        $element['#format'] = $term->format;
        $element['#element_validate'][] = 'module_validate_term_translation_description';
      }
    }
  }
}

/**
 * Validation for term translation description.
 *
 * Text format changes the value structure, so we need to change it back or we
 * see awful error.
 */
function module_validate_term_translation_description($element, &$form_state, $form) {
  foreach($form_state['values']['strings'] as &$value) {
    if (is_array($value)) {
      $value = $value['value'];
    }
  }
}