In Star Trek (2009), why would it matter that Uhura knew Romulan? In all scenes together, Starfleet crew and the Romulans were able to understand each other. Either they were all speaking the same language, or the universal translator was able to translate everything.
Either way, why would she have personally translated a Klingon distress call, or need to relieve the existing communications officer because he didn't know Romulan? Is there not a universal translator in this universe?