That's a pity. no doubt it's in the pipeline for version 5 ! :)
fyi, I did an experimental iBUYSpy ML site way back - it's still there [ http://www.247golfshop.com ].
Meanwhile, I guess the only way to move forward is to set up multiple sub-portals, each reflecting a different language. It's not such a big deal as the real effort is the translation with the 'extra' being the assurance work to ensure that the various sub-sites are in step.
I would, of course set the default language for each site appropriately.
Anyone have a better approach?