Thread:Support/lots of new Pfunc messages

I usually try to keep the number of untranslated messages in "Extensions used by Wikimedia" at 0. Today it jumped to 191. If i understand correctly, it's mostly because of the ParserFunctions extension. And the messages themselves are also a bit puzzling - they are mostly names of measurement units.

Can anyone write a little explanation - why the sudden jump and what should the translators know about this?