Glossaico is a free and open source language learning software for Linux. Currently is comes with Spanish for English speakers, German for English speakers and Basque for English speakers courses. It is based on LibreLingo app. It is written in Python and released under GPL v3+.
Install Glossaico on Ubuntu Linux
Glossaico is available as a flatpak package and you can install it from flathub. First you need to install flatpak and flathub remote repository on your system and restart it after the installation. Follow below link for the instructions.
Open the terminal (ctrl+alt+t) software and run below Glossaico flatpak install command.
flatpak install flathub org.codeberg.dimkard.glossaico
After the installation you can start Glossaico using
flatpak run org.codeberg.dimkard.glossaico
And unninstall Glossaico app using
sudo flatpak uninstall org.codeberg.dimkard.glossaico