I have 2 mandatory languages. One of them is default. When I try to publish content. it shows 2 confirmation messages in green (for each language).

But when I unpublish a content. I get this message Unpublish: The mandatory language '%0%' was unpublished. All languages for this content item are now unpublished.

It shows a parameter instead of language/variant name.

How to show the name of the language or even remove the parameter from the message.