I read FAQ on CRAN, but it was a bit confusing to a novice like me.  So here is the screenshot.  First, go to the "etc" folder under R program files folder.  Then locate Rconsole file. Find the line "language =  ", change it to "language = en"  if you want to run R in English. Save the file. Windows (I am using Windows 7.)  told me that I have no permission to change the Rconsole file and that I should contact the administrator. Thank you. !  I am the administrator/user.  I had to right click on the Rconsole file icon, select Property and grant a permission to modify the file to myself, the user.