Language filtering by Chinese

[kgiann78]

When there is a selection for Chinese (i.e. 1 document) and I select it, in the next screen, in the list of language filtering another language (as code "Cn") is present along with the "Chinese" selection with the same amount of documents.

For example:

As you can see, only the "Chinese" selection is present, which is the normal thing to show. But after selecting "Chinese":

I remember that something was going on with this specific language and not with other languages.