From Thu to now, I've translated many parts of FA's UI through the free webservice "Japanize". http://japanize.31tools.com/

It provides the function to localize the UI of websites written in English into Japanese.
The user simply install the plug-in or add-on on their browsers, then visit foreign website, and it is automatically translated into Japanese by referring each translation database created under participatory development.

Here are some screenshots :D
http://dragon.vorwarts.com/blog/arc....._sample_01.gif
http://dragon.vorwarts.com/blog/arc....._sample_02.gif
http://dragon.vorwarts.com/blog/arc....._sample_03.gif

But unfortunately, some sentences couldn't be replaced into translated one... It was mainly because there are some inappropriate contiguous spaces, breaks or tab characters between start tag and end tag in FA's source code.

Anyway, I hope more and more talented Japanese artists would join in FA by using this plug-in.
...New account registration has been temporarily suspended, though :P

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日本語ユーザの方へ：
もしよろしければ、プラグインをインストールしてみてください～。
IEは6から、Firefoxは2.0から対応しているようです。
誤訳、いけてない表現、訳してほしい場所などありましたらお気軽にご指摘くださいっ。