Context is Hindi when printing line numbers in Word 2007

[This post accompanies a question posted here: http://superuser.com/questions/90665/context-is-hindi-when-printing-line-numbers-in-word-2007]

I’m trying to print a Word 2007 document with Line Numbering turned on, and in Word the document looks fine but when I print the document, the line numbers appear in Hindi script.

On screen:
Printed:

I tried deleting my Normal template and allowing Word to create a new one, and testing using that, with no change. I also tried different printers.

The problem goes away if I choose Arabic instead of Context under Word Options -> Advanced -> Show Document Content / Numeral:

However, I would like to keep the setting as Context. The question is, why is the default context of my document Hindi script?