The suggestion is to provide the ability to deselect/hide unused languages sitewide in the admin section.

I'll give the feature request section a try. Thanks

But you have already a "available language" at global settings.

The suggestion is to hide unused languages in other parts of the GUI. You may understand my point better if you read the entire post.

Then it's not in token, but in participant panel.

Seems here, it don't take the restricted language list, but whole.

You can fill a bug report.