Ok this one won't save you in a fight, it's not a combat power in anyway. However it is useful, why? One of the many concerns about going to a foreign country is language, as in understanding it. Well that's exactly what this power does, Omnilingualism is the ability to understand and speak any language just by hearing it. (Example: You're in France and someone says "Bonjour" (Hello), just by hearing that one word you can now speak fluent french, the same goes for other countries.) The power doesn't just stop at verbal languages, but also non verbal such as sign language. Now how awesome would it be to have this power.