node:source:menu-link returns translated menu, not source menu

Thank you, the patch has been working well on my client's website for 3 years now.

+++ b/token.tokens.inc
@@ -680,12 +680,17 @@ function token_tokens($type, array $tokens, array $data = [], array $options = [
     foreach ($tokens as $name => $original) {
+      if (preg_match('/\:source\:/', $original)) {
+        $langcode = $defaultLanguage->getId();
+      }

this makes the assumption that the source is the same as the default translation, but that's necessarily the case.

What should be done instead I think is that the node:source token needs to update the langcode option to match its active language, that should be passed through both to [node:source:menu-link] (which this patch doesn't yet handle) and nested tokens.

Also, tests would be great, but source tests are quite lacking as we don't actually add translations, so it can't really be verified that this works.