I use Excel 2003. I have received a spreadsheet from a German colleague in
which they have inputted formulas in German, and example of which is:

=XINTZINSFUSS

My version of excel will not calculate these formulas as it does not
recognize them. I have looked around and discovered that I should be able to
rememby this by enabling German Language support. I enabled this using the
office 2003 language tools following instructions from microsoft.com but this
has not helped, the formula's are still not recognized.

Can someone please let me know how I can rememdy this?