It's very hard for foreign writers to get used to proper English. For every province in America has their own style of dialect. I believe writing hubs is great to perfect your writing skills. As a matter of fact, for someone who's mind is wired on another language words that don't make sense to original "USA"
Americans could make sense in "slang" English. If you grew up in a french community or if you're a foreigner perfecting English is difficult. I'm a foreigner myself and only started to learn English at age 12 as a necessity. Through year's of reading and writing, I finally attained an average of understanding how to think American. I was naturally attracted to reading, my first big English book was about D&D and reading old US comic books. Sometimes, the things you do that seem useless actually reflects back in the future. Most of that big quest that is life about learning
Since the most internationally spoken language was English, it has become more then a matter of learning for fun. It's about being able to speak out to the rest of the world as a true American would.