You should be able to do this with AutoCorrect....
Often I get a text from the outside that I have to lay out, but it is full of errors such as: a' and not à, or è and not é.
AutoCorrect don't works in this case. I'd like a script that to correct this in the text.
Ah, I didn't understand the work flow.
I'm not a scripter, but there is a FindChangeByList sample script and support text file included with ID you can use as a starting point to add your corrections.
ok, thank you, I'll see that.