Hello,
I am a second year student in international studies. This summer I would like to go to the US and to an " English program ". I have some knowledges but I would like to improve them in order to take courses in English next fall. So I am looking for a college where I can spend the entire summer learning English as a second language.
Any suggestions or advices ?
Thank you 
a school that offers strong ESL (English as a Second Language) programs that have some experience with languages like your native language would be a place to start looking.
Where in the US have large numbers of speakers of your language immigrated? The community colleges in those areas are more likely to have good instruction in ESL with a familiarity with the kinds of mistakes speakers of your language often make when speaking English.