I'm not sure what you want to say (In caso dubbio, puoi dirlo in Italiano ed Inglese.), but the plan is the following:
Every page is written only in one language (all text on the Italian page is Italian, all text on the German page is German, text on English page is English,...) except for the links to pages in other languages, which should be in the language. This is, "Deutsch" instead of "German", "Italiano" instead of "Italian", "Suomi" instead of "Finnish" and so on.
If a link leads to a page not yet translated in the page's language, it's sufficient to put (Inglese) behind the link.
Mh, this is a bit confusing, please ask to clarify.