Actually, Oliver, I asked the test-admin (who is also sysop on pswiki) to try to tackle that, and will re-emphasize that.  I actually asked him to tackle the extensions "Content translation messages – all" and "Universal Language Selector messages – all" before going back to MediaWiki Core. Maybe that's just a matter of personal taste. But given that his project approval has the rest of this week to run here, then a week on Meta, the wiki is not likely to be created before the New Year. I'll emphasize to him that he should spend some time on this over the few weeks while waiting.

Steven