My guess is that you did not get the setup.h step right; but in any case, like all things digital, compiling is a very tricky thing to get right the first time! First, read this thread: https://forum.audacityteam.org/t/solved-trouble-compiling-audacity-from-svn-with-asio/18248/1
ignore the ASIO stuff but go back and re-do the wxWidgets stuff following all directions very carefully. Compile and run some of the wxWidgets test apps–do they all run–if so go on and compile the Audacity SVN HEAD. If you get any errors something is wrong with your environment.
You must move the proper wxWidgets setup.h into the correct location for your system. Since you have already compiled wxWidgets without doing this you must go back to step one. Completely delete all of wxWidgets and re-install it; before doing anything else figure out where the proper setup.h is on your system (without knowing a lot more details about your system I cannot help you with this part) and move it (you will also need to edit it a tiny bit–see the Audacity compilation (section 5) instructions in the SVN/README.txt file). Look at the forum thread mentioned in my previous post for a lot more detail.
Simply following your steps 2 & 3 may not always work (though in 2.8.11 it might) follow the steps I list as mentioned in the previously noted forum thread.
(An aside) Unless you are running Win98 or 2000 you will need to use the Unicode stuff as Audacity is soon dropping all support for non-Unicode builds; and if you are using Win98 or 2000 you might need to drop back to VC++2005 and its support libraries.
If you fail following the above I will need a lot more details–what OS & SPs, the exact path to wxWidgets, a screen shot of your Environmental Variables dialog; a directory listing of your wxWidgets dll folder and a copy ‘n’ paste of all the warnings & errors from the Audacity build.
Since your current problem resides in a localization file and there have been lots of updated locale files in the last few weeks, I would strongly suggest grabbing a brand new SVN HEAD–make sure you do a complete new Checkout as Update does not always work (for some folks). Try to compile again, if you still have the same problem, build again (so the new build log only pertains to the error) then copy ‘n’ paste your build log (the text in your Output window) here (to keep it intact paste it between code
(the "Code" button between "Quote" and "List" above)
zh_TW.po is a Chinese language file translation–is there a chance you do not have the proper font installed? I still need a lot more info on your system to be of more help!