static $keys = [ 'acct_creation_throttle_hit', 'centralauth-contribs-locked', 'centralauth-uwbr-intro', 'centralauth-uwbr-registration-nodate', 'createacct-helpusername', 'createacct-imgcaptcha-help', 'delete-toobig', // T139797 'feedback-termsofuse', 'flow-terms-of-use-new-topic', 'flow-terms-of-use-reply', 'flow-terms-of-use-edit', 'flow-terms-of-use-summarize', 'flow-terms-of-use-lock-topic', 'flow-terms-of-use-unlock-topic', 'globalrenamequeue-email-body-approved', 'globalrenamequeue-email-body-rejected', 'mwoauthserver-invalid-user', 'privacypage', 'sidebar', 'sulrenamewarning-usenew', 'ipb-confirmhideuser', // T121639 ];
Are all messages that are overridden for WMF usage.
But https://github.com/wikimedia/mediawiki-extensions-WikimediaMessages/blob/bd14e64/i18n/wikimediaoverrides/en.jsononly contains 4 entries, but the array above contains 21
At least some of them are in https://github.com/wikimedia/mediawiki-extensions-WikimediaMessages/blob/9a9cf28/i18n/wikimedia/en.json and they should be moved to the override files
I believe, if the en and possibly the qqq are moved, the next translatewiki export should move the translations
7 of them were at https://github.com/wikimedia/mediawiki-extensions-WikimediaMessages/blob/d7b5f70/i18n/wikimedia/en.json#L243-L249