Make pages in corresponding languages, get for them incoming links from sites in corresponding languages.
You would want to figure in the results of the country specific Google sites if your clients are in those markets. Apart from the suggestions from Lessy, you can also set your target country in Google webmaster tools.
general rules of thumb + common sense. 1) have proper ccTLD 2) have proper language(s) - my country for instance is "blessed" with 2 official languages... 3) have proper IP address 4) get links from sites in this geo area (ideally from your country) 5) set this country as your local focus in google webmaster tools