Why sentences and not words?
The original sentence is: "He went to the stoar." Person A sends this to person B for review. While Person B is reviewing this, Person A changes the sentence to "Bill went to the stoar.". Then, Person B sends back the spelling correction; "He went to the store.".
If the sentence translated to one line for `diff` to work on, this would be a merge conflict. If each word was its own line, this would merge cleanly.
It might sort of drown you (a 15-word sentence totally changed to a different 15-word sentence would take up 30 lines. My default terminal size holds 36 lines.
But really because I never thought of it. Might give it a try and see if it's better.