Do you speak Spanish? I do not however I have gone to a particular church of sorts.. since I really do not know what they are saying then it is hard for me to describe it to you however it seems its origins come from Korea.. if you wish more information I will dig deeper for you. Many young people live on their property going to school locally. they are not a strict group of people but more relaxed and open. I find them to be especially nice to me even when I really have no clue what is happening there. My best friend has been attending this church as of late so therefore I accompany him to that location. All the best.
Iglesia Presbiteriana San Andrés, Spanish-speaking. We go to the one in Olivos but there is also one in Belgrano. We know several families who go there. I think they have Spanish and English services, but not sure.