Exposed filters don't work with tagadelic views

I tried to set up a tagadelic view of a taxonomy vocabulary called "Tags".
I have to set up some filters. One of them is a taxonomy vocabulary called "Language".

In the "filters" section I selected "All" in order to display the tag cloud for all the available languages.
But then I wanted to let users select a specific language and display the corresponding tagcloud.

So I declared "Language" as an "Exposed filter".
But the tagcloud didn't change. When a specific language is selected, it's not taken into account. It's always the same tagcloud for all the languages.