also this could lead to another issue...it could lead to the 'Why don`t you translate the whole UnderNet in all languages ?' question...
Translatable undernet parts are the MOTD, the bot interface (X) and the website.
The IRC Channels are divided into languages by themselves.
Anyway, I always thought only important stuff should be translated in other languages, which already happened.
Keeping in mind that English is the most spoken international language will give others a reason why other stuff is written in English, even if they don't know it.