Issue #3458202: Provide default string as note in string_tmgmt XLIFF file export

modules/string_tmgmt/src/Plugin/tmgmt/Source/StringSource.php

@@ -25,4 +25,15 @@ class StringSource extends LocaleSource {
     return ['default' => $this->t('String')];
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getData(JobItemInterface $job_item): array {
+    $structure = parent::getData($job_item);
+    if ($string_id = $structure['singular']['#text'] ?? '') {
+      $structure['singular']['#label'] = \Drupal::service('string_translator.string.defaults')->getStringTranslation('en', $string_id, '');
+    }
+    return $structure;
+  }
+
 }