Currencies, Taxes and Languages Setup
With osCommerce you can also set up the sales taxes for certain regions of countries or states. That can be done in the Locations/Taxes section of the administrative interface.
To change the languages and currencies, you will need to visit the Localization section. The currencies that are included in the standard installation will be listed, with the US Dollar being the default one.
You can define other currencies as well, according to your preference. Please note that in case you are having more than one currency, you will need to specify values for the additional ones, relative to the default one (the default currency value should become 1, and all other have values, relative to it in order to have the prices computed correctly).
New languages can be downloaded from the address below:
http://www.oscommerce.com/community/contributions
The language packs include instruction on how to set the new language up.