I am an American, studying French and Spanish, on Windows 8.1. For typing in web forms (and in any other program), I installed Windows keyboards for French and Spanish. Windows lets me switch between keyboards easily, by either (a) an icon in the system tray, or (b) the key combo Windows Key + Space Bar. In Firefox I installed a spell checker for French and Spanish. Very nice. But when I switch between languages, to get the correct spell checker I have to right-click in a text field, then go to Languages and select my current language. A minor inconvenience. It would be nice for Firefox to detect which keyboard I am using and switch to the appropriate spell checker automatically. Is it possible please? I keep the user interface for both Windows and Firefox in English always.