locale problem

I have a corrupt collection and am trying to use the mkvdk utility to repair it. However I am getting an error message that the verity locale is "english" and my cmd prompt locale is "englishx". So I intend to use the chcp command to change the locale of my cmd prompt window. I have tried the usual ones but to no avail. Does anyone know offhand what the locale number is for verity "english"? Cheers