I'm having that same issue with my server. Currently using version 2013-08-07.
Also having issues with Navigation(it crashes everytime I try to use it) and the minimap buttons still displaying korean tooltips.
When I get back home from my job I'll finish up a new server and client(2014-02-05, as that's the newest stable client I could find) to test if i'll still have that problem.
My problem is fixed. Whatever it was, it had to do with the server, not the client.
This time I downloaded the server files from: https://github.com/rathena/rathenausing TortoiseGit.