Solution 1. Usually in Microsoft Windows 2000 and XP, there is a setting under “Regional and Language Options” in the “Control Panel”, that would install additional components for East Asian languages.
Control Panel > Regional and Language Options > Language (tab) > Install files for East Asian Languages (checkbox)
Solution 2. Download and install the language pack(s) directly from Microsoft’s website.
Office XP Tool: Global IME (Simplified Chinese)
Use the Microsoft Global Input Method Editor for Office XP (Simplified Chinese) to input Simplified Chinese text in your documents, worksheets, presentations, mail messages, publications, and Web pages.
Use the Microsoft Global Input Method Editor for Office XP (Traditional Chinese) to input Traditional Chinese text in your documents, worksheets, presentations, mail messages, publications, and Web pages.
The Traditional Chinese Language Pack installs Traditional Chinese language support files for the operating system.
Office XP Tool: Simplified Chinese Language Pack
The Simplified Chinese Language Pack installs Simplified Chinese language support files for the operating system.