The language system used on Dark Horizon is the same as the one used on Land of Sorrow.
However, as actual languages are featured in this Verse, I won't create word data banks in order to translate each single word in any language. Plus those translations would be crappy and I'm not that crazy anyway. ^_^
So here's the catch:
As opposed to LoS, nothing is displayed in the chat window when someone is speaking; If your character is able to understand, then the text will appear in the system window only.
Here is a list of languages featured in Dark Horizon:
Chinese
English
French
German
Italian
Japanese
Spanish
Russian
If there are any other languages you'd like to see featured in Dark Horizon, speak up.