Quatta

https://gpt4all.io/index.html not appimage but run on Ubuntu: https://gpt4all.io/installers/gpt4all-installer-linux.run

My opinion is the best translation program:

1. Firefox Translations provides automated translation of web content. Unlike cloud-based alternatives, translation is done locally, on the client-side, so that the text being translated does not leave your machine. Firefox Translations was developed with The Bergamot Project Consortium. https://addons.mozilla.org/en-US/firefox/addon/firefox-translations/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search

2. Desktop version of Bergamot MT: https://translatelocally.com/ translateLocally is a privacy focussed machine translation application which translates content privately and securely on the user's own computer.

Not open source but privacy friendly:

Brave Translate (Lingvanex) https://support.brave.com/hc/en-us/articles/8963107404813-How-do-I-use-Brave-Translate-

"Digitisation efforts in Bratislava were supported by the Bloomberg Philantropies network which helped the working team to apply agile and design thinking techniques throughout the process, based on the experience of working with other cities. Additionally, Bratislava’s mayor participated in two dedicated programs, and contacts were made with other cities in the United States and Europe such as Budapest, Prague, Vilnius, Amsterdam and London."