I have noted that all my established sites running Enterprise for over a year now has '%' signs everywhere for all languages. This happened an hour ago (Saturday morning) and I presume is due to a temporary Enterprise error?
I have also noted this same error on other Enterprise sites listed in your forum as posted by other customers. So I presume this is a central cache error, and hopefully also temporarily? All the sites are showing the English wording with '%' everywhere for all languages.
I hope the cache can be restored soon.