comma instead of decimal point in numbers

Hi,

Our Spain users have a trouble envisioning American standard of using decimal points in numerical values, apparently in Europe(at least in Spain) they use comma(,) instead of dot(.) for all their currency number values when they see it in front end (PIA).

Is there a way we can change this for region/country/user specific or currency EURO displays in their regional standard instead of US standard?

Kuldeep