last untranslatable sentence. Italics ?

You don't understand: I agree that this sentence in English will remain on all pages, but there's no reason why it can't be displayed as well in the actual language of the translation. That's the reason of the suggested #if. Without a translation, the fact that it appears without notice in English will mean nothing to readers, given that they will still not realize that the page is a translation. Look at the code I proposed: this clearly keeps the English sentence within the template, in addition to providing a translation of it just above, at end of the article (and this translation is NOT emphasized in italics, as italics are not convenient in some complex scripts like ideograms).