The world uses A4, except the americans, who tenaciously keep the default
as american, so rest of world should apply this:

*** jhs-4.5-RELEASE/src/gnu/usr.bin/groff/Makefile.inc	Wed Mar 27 16:59:09 2002
--- jhs/src/gnu/usr.bin/groff/Makefile.inc	Wed Mar 27 17:14:03 2002
***************
*** 6,12 ****
  # Define `PAGE' to be `letter' if your PostScript printer uses 8.5x11
  # paper (USA) and define it to be `A4', if it uses A4 paper (rest of the
  # world).
! PAGE?=letter
  
  # Normally the Postscript driver, grops, produces output that conforms
  # to version 3.0 of the Adobe Document Structuring Conventions.
--- 6,12 ----
  # Define `PAGE' to be `letter' if your PostScript printer uses 8.5x11
  # paper (USA) and define it to be `A4', if it uses A4 paper (rest of the
  # world).
! PAGE?=A4
  
  # Normally the Postscript driver, grops, produces output that conforms
  # to version 3.0 of the Adobe Document Structuring Conventions.