Installing East Asian language support under Windows
From MozillaZine Knowledge Base
You don't need to modify Mozilla Suite/Firefox/Thunderbird's configuration or download a plugin to display webpages or emails written in Chinese, Japanese or Korean characters. You only need to make sure your operating system has East Asian language support enabled. But, If you need Mozilla Suite/Firefox/Thunderbird's interface and menus to be in another language than English, download a localized Mozilla Suite / Firefox / Thunderbird release.
This page outlines the steps for installing East Asian languages on a computer running Windows so that the user can display East Asian characters.
Windows 2000 Professional
Windows 95/98/NT4 users have to download Asian language support from Microsoft's Web site.
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