If you do anything other than a purely default installation, there is a real chance that some dialogs will be displayed in English instead.
Ma yella tgiḍ ayen-nniḍen ɣef usebded amezwer, tella tegnit meqqren ad d-ttwaseknent kra n tbewwaḍin n udiwenni s teglizit deg ubdil n wayen.