Issue #3273442 by a.sotirov: InvalidArgumentException: Invalid translation language (xx) specified

ggroup.tokens.inc

@@ -81,7 +81,9 @@ function ggroup_tokens($type, $tokens, array $data, array $options, BubbleableMe
   }
 
   $langcode = $data['group']->language()->getId();
-  $group = $group->getTranslation($langcode);
+  if ($group->hasTranslation($langcode)) {
+    $group = $group->getTranslation($langcode);
+  }
 
   if ($group_tokens = $token_service->findWithPrefix($tokens, 'group')) {
     $replacements += $token_service->generate('group', $group_tokens, ['group' => $group], $options, $bubbleable_metadata);