"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. - See more at: http://cdex.mu/download#sthash.FGUzvxCN.dpuf"
Je to tam jasně napsané. Češtinu stáhneš v txt, vložíš do správné složky programu a po restartu programu ji načteš v options -> language.