I was very proud when this ticket appeared in the issue tracker.
From the programming side in order to make wxMaxima multi-language the maxima-specific stuff would need to move behind an abstraction layer. Which might be a good idea, anyway. And we would need someone with the need to use a scientific tool different to Maxima and with time to do the actual programming.
As wxMaxima uses a big range of wxWidget's features and has grown quite fast and stable I was already thinking if it was worth to ask if it were elegible for the showcase on the wxWidgets homepage...