Thank you guys for your answers. I ended up cloning the qutebrowser repo from GitHub and running the following from within the repo
python3 scripts/dictcli.py install it-IT and it worked out of the box. Note that running this did not ask for any root access. One solution might be to add an executable script in /usr/local/bin/qutebrowser-dictcli that allows people to at least simply install new dicts from the terminal? -- Valentin
