For Google Shopping, you need to use a language and a currency that’s supported for your target country.
Ideally, the currency on your website and the currency in your target country match.
In case they don't match, you can benefit from Google's currency conversion tool. You can use this tool to expand the reach of your products to more countries by automatically converting the original currency to the required currency in the target country. The converted price estimate shown in your ads is based on exchange rates from Google Finance.
Please keep in mind that you also have to meet the target country’s language requirements.
Check the currencies of each country in Google Shopping here.