Hi,
I really like the feature, which analysis the word repetition, and marks words, which were already written recently. These are good hints.
But there are word, which are repeated naturally often like "the" or "a" and these do get marked, too.
So, I would suggest a feature, where one could create a set of words, which are treated as exceptions to this analysis.
Anonymous
Perhaps for the long range detection
Otherwise it is the the classic case it should warn about