According to this video, quite a bit of propaganda crept in
to what is widely acclaimed as a very gritty, accurate depiction.

The Scots actually tried to win with a series of night attacks.
The next day, hungry and tired, charging across open ground
lead to a debacle and the effective end of the Jacobite cause.

In one of a series of novels about the original Star Trek crew, our heroes escape the bad guys by going back to the past. As fate would have it Scotty lands at Culloden the day before the battle. Prince Charlie asked him if he's going to win tomorrow. To which Scotty replies "no, but they are going to put your picture on whiskey bottles for the next 500 years."