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I'm not sure equivset would help. It prevents confusable characters, not different characters. I'd say we prohibit characters not used by any supported languages by MediaWiki. But that'd not be popular (you know, customising your signature is more important, etc. <irony>). —MarcoAurelio (talk) 09:04, 20 October 2019 (UTC)
Yeah, well after today's spambots, yet again and with no change in approach over the past years, and … <shrug> Volunteerism … used, abused, spat out the end. — billinghurstsDrewth 09:40, 20 October 2019 (UTC)
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
The API sandbox and help pages now show more clearly when API modules are marked as internal. API modules marked as internal were probably internal before. It was easier to miss. You should look for non-internal alternatives. 
There is a translation tool we use on wikis with more than one language. For a few days it did not create pages for new languages when someone translated a page. The languages did not show in the language bar. This has been fixed. 
The history and diffs can show wrong content. This is because of a cache problem. It will soon be fixed. 
Changes later this week
The new version of MediaWiki will be on test wikis and MediaWiki.org from 22 October. It will be on non-Wikipedia wikis and some Wikipedias from 23 October. It will be on all wikis from 24 October (calendar).