Maybe I should clarify, the key name shown in the keybindings menu is something that is understandable by GTK so it can set it, and we can save and restore it in the keybindings file, specifically it must be readable by [gtk_accelerator_parse()](https://developer.gnome.org/gtk3/stable/gtk3-Keyboard-Accelerators.html#gtk-...).
Note that the user can directly edit the shortcuts in the keybindings prefs dialog, they don't have to use the capture sub-dialog. As there is no way of un-translating key names so they have to be in the portable form, which happens to be English.