Automatic language switcher

I have been using a computer with automatic language switching Punto Switcher for a long time. Very comfortable and already used to it. And now I bought I-Pad with a keyboard and am constantly tormented by switching between two languages ​​English and Russian, and it is especially annoying when typed a whole sentence, but did not switch the language. And let's do it again. Can you make a program on a tablet with keyboard with such automatic switching?