This changeset modifies ParagrahEditor #nextWord: and #previousWord: so they will return the index of the next word inside a composed word (meaning for a composed word an string like this 'aComposedWord').
As an example. Imagine that you just typed the string 'aComposedWord', and you want to change the 'Word' part. If you type CTRL+left arrow, the cursor will be at the first $a, not the $W. This changeset modifies ParagraphEditor behaviour so it can navigate inside composed words too.
I made a preference for this. It is named:
Preferences disable: #useAlternativeWordJump