Writing to village pumps is sometimes useless, not everybody looks at them so you still rely on someone to forward the message to its actual consumers. If there's a specific affected page, as in this case, you're lucky because you can write on its talk. On big wikis people necessarily use watchlist to keep track of discussions they're interested to, and on small wikis RecentChanges will suffice to alert most active users. So, as already suggested on https://meta.wikimedia.org/wiki/Global_message_delivery/Instructions , 1) Write on mediawiki.org an announcement clarifying what needs doing, 2) make it a translatable page, 3) take the distribution list and point all projects to MediaWiki_talk:Welcomecreation, 4) send a simple two-lines alert pointing to the mw.o page and inviting users to translate and reply there.
Nemo