1. Config locale
sudo raspi-config
3. Select "Change Locale"
4. Select "en_US.UTF-8" & "zh_TW.UTF-8", and Press "OK"
5. Select "en_US.UTF-8" or "zh_TW.UTF-8" for console
6. Install 酷音中文輸入法
sudo apt-get install scim-chewing
sudo apt-get install ttf-wgy-microhei ttf-wgy-zenhei xfonts-wgy
Refer to:
https://blog.gtwang.org/iot/raspberry-pi-chinese-input-method/