If you are getting a Dictionary file error on Start Up of TBC, DO NOT delete the dictionary file.
The correct fix for this is to open the TBC Installer for your version, in place of Install there will be a Repair option. Use the repair, this should take just a couple of minutes. Once complete, open TBC and your error should be gone.
If this does not work. please submit a support ticket through TBC and we’ll get on a call and try to resolve the issue. This might take IT’s involvement depending on admin permissions.