Delete this account

As can be seen here, my account was rejected and created afterwards (meaning it was completely deleted when it was rejected at first). I knew that MediaWiki doesn't allow this, but the fact that my account was deleted resulted in my impression that deletion is indeed possible (and as it seems it really is, but from your answer I take that this is not when the account was accepted once. Closing this issue is correct then, just leave it as it is.

Yes, that's a feature of the Translate sandbox.

Rename to User:Vanished~number_or_anything_that_is_not_my_username and following indefinite block would be great than, thanks.