The latest and greatest functionality of Reasonator, allows you to do what you would like to do the most; add the missing labels in *YOUR* language. It is easy when you have set your personal settings.
When you add a label, just consider what it does; everywhere where this property is used the new label will show. Just by using Reasonator and adding missing labels you will make a difference really quickly. In my opinion there is little you can do that is as effective in making information available in *YOUR* language.