https://meta.wikimedia.org/wiki/Special:CentralAuth/Translation_Notification_Bot@Translation_Notification_Bot looks like an account created in the early days of TranslationNotifications whose name is identical to https://gerrit.wikimedia.org/r/#/c/operations/mediawiki-config/+/603167/2/wmf-config/CommonSettings.php
Given that this account is broken and uses an invalid @ character in its name, I'd like to ask the maintainers if it is okay to rename the account to something like Translation Notification Bot (broken) and globally lock it afterwards.
Note that this is NOT https://meta.wikimedia.org/wiki/Special:CentralAuth?target=Translation+Notification+Bot, a different account (which by the way is now no longer used).