I just made a fresh install of OS X Mavericks and got Tex Live Utility through their Google Code website. The strange thing is that it is in chinese language. And I can't find the button to change it. Anyone else having this problem? Or anybody who knows where to change the language?
In the Language and Region system preference there should be a list of preferred languages. You can add or delete languages as makes sense for you. If a particular application isn't localized for the main language you have chosen, it will go down the list of languages until it finds a language for which it is localized. Make sure that the list of languages in your preferences makes sense for you.
This preference has changed in Mavericks, so it's possible that the issue never came up before.