It would be nice to find all lines without translation, i.e. with the same text in different languages. It could be done in "Show only lines with warnings or changes" and highlighted with light yellow.
Another ideas could be taken from Zeta Reosurce Editor (which is not supported any longer)
http://www.codeproject.com/KB/aspnet/ZetaResourceEditor/zeta-resource-editor-color-legend.png
Another ideas could be taken from Zeta Reosurce Editor (which is not supported any longer)
http://www.codeproject.com/KB/aspnet/ZetaResourceEditor/zeta-resource-editor-color-legend.png