Locale Key Coverage

Compare keys across locales, separating the three states a single completeness figure hides. An absent key shows the base string, the key itself or nothing, depending on the loader. An empty value satisfies a completeness count and renders nothing, which is how a blank interface passes a translation report. A value identical to the base is either untranslated or a loan word, and nothing says which, so the ambiguity is stated. Also reports a key no base locale defines.