(Split from bug 44864 comment #4)
(In reply to comment #2)
Why is that category a translatable page if there is nothing to translate?
Note: By way, if category have no translatable strings, upper caption is
page is a translated version of a page and the translation is 0% complete".
my opinion, should be "100%".
This is because the bar assumes there will always be at least one translation unit, the page title.
This is IMHO a correct assumption, because the pagedisplay / displaytitle for categories should be translatable as in all pages (and I thought it was; maybe this changed at some point). However, if for some reason devs decide the contrary the calculation bug reported by Kaganer remains.