I did install ibus-chewing by
sudo apt-get install ibus-chewing, terminal told me it's been installed and is already the newest version, but I cannot find
chewing in my input settings. How can I enable chewing or other zhuyin input methods?
You can generate e.g. the
sudo locale-gen zh_TW.UTF-8
This is rather confusing. I just submitted an issue to the GNOME developers: