Arabic         Hungarian 
Bulgarian    Italian 
Chinese      (simplified) Japanese 
Chinese      (traditional) Korean 
Croatian      Norwegian 
Czech         Polish 
Danish        Portuguese 
Dutch         Romanian 
English       Russian 
Finnish       Serbian 
French        Slovak 
German      Spanish 
Greek         Swedish 
Hebrew      Thai 
Turkish 

           In addition, AdSense for search is available in Indonesian and Vietnamese. These languages are not supported for AdSense for content pages. 

You can select your site's primary language during the application process. If you're approved, AdSense will serve relevant ads to your pages in the appropriate language, even if your site contains multiple supported languages.