I have subqueues with different languages each subqueue work independently for each language, When I try to add a new content to the subqueues using the module I got the last subqueue only.
Add a new content that uses a bundle with entityqueue.
Try to add the new node to the entityqueue.
Notice that if you want to add a (specific language) node, You can't find the subqueue for this (specific language) and it always return the last subqueue for all the languages UI.
Check the site current language And return the ids for subqueues with the same langcode as the site current language
Needs review
2.0
Code
Thanks, Oways, for reporting and patching.
Please, open a new merge request.
Drupal.org is not showing a way to commit with --author any more
They moved that to the Gitlab server https://git.drupalcode.org