The guy:
"Nihilus wore a mask of possible Hendanyn origin and spoke an unsettling, literally extirpating, tongue. Jedi seers sampling it from a Sith holocron proclaimed its intelligibility required mere patience, for Nihilus’ was the language spoken billions of years hence, at the end of all time. Jedi mystics offered a slightly less fantastical hypothesis: impossibly, Nihilus spoke the raw dialect of the Force itself, untranslated by midichlorians—one needed only die to comprehend it."