Dear Maintainer,
I installed plasma-keyboard for use with my touchscreen device, and enabled the above input methods. However, each of them did not fully function. zh_CN and ja_JP displayed a keyboard, but only the latin input was functional. The bar that was meant to display the pinyin/kana candidates did not appear, and I was only able to input latin characters. zh_TW was the most severe, where the entire keyboard was blank. According to KSystemLog, the error is as follows:
qml: Qt.createQmlObject(): failed to create object:
file:///usr/share/plasma/keyboard/layouts/ja_JP/inputMethod.qml:1:57: JapaneseInputMethod is not a type
qml: Qt.createQmlObject(): failed to create object:
file:///usr/share/plasma/keyboard/layouts/zh_TW/inputMethod.qml:1:57: TCInputMethod is not a type
qml: Qt.createQmlObject(): failed to create object:
file:///usr/share/plasma/keyboard/layouts/zh_CN/inputMethod.qml:1:57: PinyinInputMethod is not a type