[Grml] Locale settings for US

[Mark]

Grml locale stuff is developing, but here's a question.  We have a
strange behavior on the numeric keypad.  In grml tty it gives a period
(US style).  In X sessions it gives a comma (European style).  What
should we set to fix this?

Current /etc/default/locale values (the rest undefined):

# File generated by grml-setlang
LANGUAGE=us
LANG=en_US.iso885915
LC_ALL=en_US.iso885915
LC_MESSAGES=en_US.iso885915
COUNTRY=US
CHARSET=iso8859-1