The extension is licensed under the GPLv3, so you are free to use it, modify it and improve it. Here are some ways to contribute:
The extension needs to be translated to more languages. You are welcome to translate it to yours!
The translation template, in gettext format, is located in the po folder.
The .po files should be listed in the gettext_create_translations() command
of the CMakeLists.txt.
There are also some translatable strings in the XML file inside of the polkit
folder.
You can send the translation through a pull request or through the issue tracker.
You are welcome to fix bugs or add new features. Find bugs that need to be fixed in the issue tracker.
The Python code was indented using tabs.
If you add any translatable string to the extension, please run the "generate-pot-file.sh" script to update the translation template.