working on a new cross platform mmo

[z33dev33l]

its called posthuman and its set in a modern warzone that is overrun by zombies. ive got the pc version up and running but before i start buying large server space i want to know what kin of languages im going to have to use to port it over to ppc. i have no problem learning new languages or anything 3'd just like some idea of what languages ill need. ive never coded for ppc before