its easy enough to program a word processor program to "auto correct"

It's not really programming in any technical sense. In fact, the word processor is already programmed to do this, and the user is simply choosing to turn the function on or off. By default, Word does just this. (I've gotten pretty good at turning all these annoying features off in a little under ten minutes: auto-correct, auto-format, damned Clippy "help" animation, etc.)

Ceci n'est pas un seing.