The point I am trying to make Alex, is that many of us have been using D7 for 3 years now and have already corrected or customized some of the same language strings that your upgrade process alters. Adding NEW language strings to an existing installation is one thing.... Modifying existing strings is something entirely different. It's a step some people, including myself, may not want your upgrade script to do automatically. This is a step that we as website administrators should be able to choose see more whether or not we want. I certainly appreciate the good intentions, but one persons good intentions is sometimes another persons pain in the ass.