SDK2.1と、nls2.0.xだと、
File Edit Navigate 検索 Project 実行 Window Help
とメニューが中途半端になってるけど、
ある意味これでいいんですよね？

These translations are based on the Eclipse 2.0.2 build but should
work on any 2.x build. Naturally, new strings added to Eclipse
since 2.0.2 will not show up as translated in the 2.1 stream when
you install this language pack. These translations have only been
tested on Windows.

あほだから、↑がよくわかりません。