Install fcitx-module-fullwidthchar-enhance by entering the following commands in the terminal:
sudo apt update sudo apt install fcitx-module-fullwidthchar-enhance
Description:
Fcitx fullwidthchar enhance module for Sogou pinyin
fcitx-module-fullwidthchar is a module for Sogou pinyin
Homepage: http://pinyin.sogou.com/linux/
Version: 0.0~git20150311-1
Section: universe/utils