Install stardict-plugin-festival by entering the following commands in the terminal:
sudo apt update sudo apt install stardict-plugin-festival
Description:
International dictionary - Festival TTS plugin
StarDict is a cross-platform and international written in GTK+ 2.x. It has powerful features such as "Glob-style pattern matching", "Scan selection word", "Fuzzy search", etc. . This package contains Festival TTS plugin for StarDict which can pronounce words.
Homepage: http://stardict.sourceforge.net/
Version: 3.0.1-9.4
Section: universe/utils