Consider the following scenario:
- You have a PC with Windows 8 or Windows RT installed on it.
- Through the Language applet in Control Panel, you add Chinese (Traditional, Taiwan) as an additional language to use in Windows.
This behavior is by design. While the Chinese (Traditional, Taiwan) language pack can be found on PCs available in Taiwan, Microsoft is unable to release the language pack outside of Taiwan. For this reason, this language pack is not available on Windows Update and cannot be downloaded using the Language applet in Control Panel.
To resolve this issue, use the Chinese (Traditional, Hong Kong SAR) language pack instead. This language pack is intended for worldwide users of Traditional Chinese even though the region is shown as Hong Kong.