CDex has support for several languages, the current distribution only packs a couple of language files to keep the file size of the distributable to an acceptable level, the language specific files(s) can be download here.
Select the language of your choice, put the downloaded language file into your CDex folder, and restart the application. From the Options->Language menu option the language of your choice should be selectable.
Chinese (Simplified / GB2312)
Chinese (Traditional / BIG5)
Changes since CDex 1.51 (release)
Fixed Vorbis comment field problem and track number field problem
Updated to GNU based winamp plugins
Support conversion of WAV files > 2 GB
Updated Lame encoder
Updated Ogg encoder libraries
Add patches CDex 1.60++ (cue sheet generation)
Updated several language files
UTF-8 support for CDDB