Are Wii games multilanguage (EU Region)?

Games are locked by television regions. NTSC-U/C applies to USA & Canada, NTSC-J to Japan and PAL applies to a set of countries, which include the United Kingdom and Italy.

The language depends on the publisher/game; I have seen games have different amount of languages...

From my experience working on localized games, usually Europe territory (which sometimes includes Australia too) is known as EFIGS, or English French Italian German Spanish.

So most localized games you might find in UK would be also in Italian. But they need to be localized, something that is usually stated on the box (which you might be able to look at even in Internet shops).

Hope this helps!