how install fcitx-frontend-gtk3 ubuntu

ubuntu

fcitx-frontend-gtk3

Flexible Input Method Framework – GTK+ 3 IM Module frontend
https://github.com/fcitx/fcitx
Install sudo apt install fcitx-frontend-gtk3
Description:

Fcitx is a input method framework with extension support, which provides an interface for entering characters of different scripts in applications using a variety of mapping systems.

It offers a pleasant and modern experience, with intuitive graphical configuration tools and customizable skins and mapping tables. It is highly modularized and extensible, with GTK+ 2/3 and Qt4 IM Modules, support for UIs based on Fbterm, pure Xlib, GTK+, or KDE, and a developer-friendly API.

This package provides the GTK+ 3 IM Module frontend, which is recommended for all desktop users. This is the best solution if you are looking for a better input experience with GTK+ 3 applications.