IBM has donated translations from their WebSphere Studio products
to Eclipse.  The language pack is distributed as a feature which
you can install by downloading the zip file, unzipping it into
your Eclipse directory and restarting Eclipse.  This language pack
contains translations for German, Spanish, French, Italian,
Japanese, Korean, Portuguese (Brazil), Traditional Chinese and
Simplified Chinese.

WWW: http://download2.eclipse.org/downloads/drops/L-2.1.x%20Translations-200307021300/index.php