Pull requests welcome! Please make sure you add tests (in an easy pytest format) to the tests folder for your fix or features. Make sure you add documentation covering a new feature.
Plumbum.cli prints various messages for the user. These can be localized into your local language; pull requests adding languages are welcome.
To add a language, run ./translations.py from the main github directory, and then copy the file plumbum/cli/i18n/messages.pot to plumbum/cli/i18n/<lang>.po, and add your language. Run ./translations.py again to update the file you made (save first) and also create the needed files binary file.
See gettext: PMOTW3 for more info.