Currently every language is shown with progress by percentage. But if I know that 12% is not translated to Italian it gives little information how much should I spend for it to be translated. As usually translators charge per word it is very important to know how much words is untranslated.
The popup could have “more…” label to show more information, and not just percentage. Or at least allow to copy all untranslated words from column when enter “Browse phrases”