I didn't see anyting regarding the terms for non-English Adsense ads and I'm wondering how to implement ads on non-English versions of a site.
For example, I have a 200 page site written in English about widget safety. The site has become a good resource and I want to offer that resource to people that speak other languages. Can I add a link to the English version of the site that points to the translated version and get Adsense ads to display in the proper language?
Do I need to create a subdomain? Would I need an Adsense account for each language? (not sure how that would work, looks like only one account per client). Do I need entirely different sites? The goal is to display relevant ads in the proper language for each version of the site. Can this be done?
Rumbas has it right - the technology will look at your site page by page, and will automatically detect the appropriate language. There's no need for another account or another subdomain - you can have a site with pages in all 6 supported languages, and each page will have ads in the appropriate language.
To confirm Rumbas' other point, please make sure to place the ad code only on pages that are in a supported language, so that you're complying with the program policies.
TrafficL ... it depends of the content .. I have my site english/spanish (the most of the vistors are spanish) and I'm usign the alternate ad to a php script to count number of fails .. so no PSAs ... about 80% of the time I get targeted Ads.
It depends of the content.
Edited : what PatrickDeese says above is true also