if you want a Japanese kanji text, then follow these steps :
1. go to your bin file where DBX2 is located. 2. click the .config file 3. scroll down till you find the language : english 4. change the language : english to language : Japanese 5. that should solve your problem. there is no official mod for changing languages.
note : if none of that works, then just open DBX2, go to settings, -game settings, and change the voice language to Japanese.