The Spanish line says: El viejo establece pollos en el este! which translates in English to "The old man raises chickens in the east."
If you're familiar with all the English lines to Attack Attack!'s Smokahontas, it is quite clear that the phrase does not have any association to the message that the song wants to put across.
A contributor of Genius.com explains: No clue how is it related to the song, in any sort, of human way. Unless Caleb Shomo went on this one Jon Mess, the unclean vocalist of post-hardcore band Dance Gavin Dance who is known for writing nonsense lyrics.
Attack Attack! was formed 2007. During their years together, the band released three studio albums: ‘Someday Came Suddenly’ in 2008, a self-titled record in 2010 and ‘This Means War’ in 2012.
After many lineup changes in their relatively short existence, Attack Attack! announced their break up in 2013.