Install gtk3-im-libthai by entering the following commands in the terminal:
sudo apt update sudo apt install gtk3-im-libthai
Description:
GTK+ 3 Input Method Module using LibThai
LibThai is a set of Thai language support routines aimed to ease developers' tasks to incorporate Thai language support in their applications. It includes important Thai-specific functions e.g. word breaking, input and output methods as well as basic character and string supports. . This package provides third-party plugin for Thai input method in GTK+ 3, including input sequence correction, using LibThai.
Homepage: https://linux.thai.net/projects/libthai
Version: 0.2.1-8
Section: universe/libs