Is there an application that guesses what language you are typing in and switches the keyboard layout automatically? The idea is that you may start typing in, say, German in any text editor, the application guesses that what you are typing makes more sense in, say, English, so it switches the keyboard layout to English and corrects what you had mistyped.

That's good for lazy typing but more importantly it helps with those annoying moments where you realise that 3–4 words you've just typed are in the wrong language, so you have to delete them, switch layout and start again.

Keyboard Switcher supports only three languages and Key Switcher disappeared.