From this morning something is not working on it.wikipedia.org.

All interface texts are in English and the special page "All system messages" shows the default English texts instead of the translated one.

The worst issue is that the Main Page has reverted to the "Wikipedia" article instead of the right one, "Pagina principale". I fixed this with a redirect, that of course must be only temporary.

I briefly looked at de:, fr: and es:, and they don't seem to suffer from the problem.

Alfio