This bug is about enabling the feature which allows the user to edit reply header strings. If the user really wants to change the default string, that is possible by editing the prefs. There is an issue of word ordering which may vary depends on languages. That is partially done by specifying the reader type, but there is also a need to present "%s wrote" to the user, so the user can select "%s wrote" or "wrote %s". I haven't come up with a solution. Please write your comments to the bug.
Thanks, Naoki http://bugzilla.mozilla.org/show_bug.cgi?id=107884
