Well, LangOver puts a stop to that in the easiest way yet devised. When LangOver is running, you can simply press F10 for any text that you have typed to be fixed, and the characters to be replaced with the right ones.
And additional keyboard commands that you can use include one for translating the text in its entirety using Google Translate (Ctrl + G), and also search any portion of it (Ctrl + S).
As a tool, LangOver can be used at just no cost. The application is really lightweight, and you are sure to be able to run it.
Why LangOver.com It Might Be A Killer
Translators will relish having such a powerful tool available, not the least because it is free.