Over two weeks, three out of four mobile sign-ups failed, most of them on the password rule — which the screen never stated, so people guessed until an anti-abuse limit stopped them trying. The rules are shown as you type now, in your language, word for word as the server states them. A name written in Arabic, Japanese or Turkish could not be used as a username either, so the form suggests one from your e-mail address. And that limit has been split, so failed attempts no longer count against you.