Key Switcher Key Switcher automatically changes the keyboard layout to the desired language while you are typing. The program "understands" 24 languages in any combinations. Besides the layout itself, Key Switcher can also correct common typos, incorrect letter case and double capital letters, etc. And if the text is already typed in the wrong layout, the program will help you convert it to the right one. It also shows you the country flag icon when you change the layout. In the Key Switcher settings you can edit or add word substitution and error correction rules.