Yahoo!の認証API

ためしてみたのですが、画面が英語なので、日本語ユーザー向けのサイトを作るときには使いづらいですよね。
Yahoo!Japanも出してほしいです！

Browser-Based Authentication

You build great web applications. We have millions of users who store their data on Yahoo!. Browser-Based Authentication (BBAuth) makes it possible for your applications to use that data (with their permission).

BBAuth also offers a Single Sign-On (SSO) facility so that existing Yahoo! users can use your services without having to complete yet another registration process.