Okay when u were born american like me and then u live with a mexican family how can you learn spanish so fast or can you?

Watch movies or shows in Spanish it helps a lot. Also try having conversations with people in Spanish with as much as you know. 

Because they recently talk to you in Spanish and your consouseness observe it and it transelates and you now know what it means and because your family teaches you

There are many examples of how latin influence has come to america and is here to stay. one for example is the banana. a fruit that was only grown in south america for years but then came to america in the early 1900s. it was propagandized as an exotic fruit from latin america during the first world war and took america by storm. now bananas are wildly used in the united states as one of the most popular fruits. another example is clothing. now more than ever ponchos, tribal prints from latin american latinos (such as mexico, peru, honduras, colombia, etc) are popularizing the colorful prints the latin american indigenous people would use, on back packs, sweaters, jewelry, blankets, etc in the "hipster movement." these things were originally popularized in the 90s after a mass movement of immigration after the regan administrations amnesty. but this trend continues in america today.