Thus far Robo Kiss changes have been run through program AutoWikiBrowser. I am now investigating another program called Pywikibot which can apparently be used to help with automatically adding interlanguage links, at least where page names match between the languages. I mention this in this public-ish place because it looks trickier to set up, so if I give up on it before accomplishing anything someone can poke me and remind me to try again.
Using a different installation guide and then the manual for the interwiki script, I think I've got it going. It looks like it only deals with editing one language's pages at a time--probably a good thing, since not all the other-langauge wikis we're interlanguage-connected with are connected to each other, so adding all links to all wikis would be Bad.
It also looks for and makes changes when pages in another language have been moved or deleted.