How to change trends category on twitter?

The trends on twitter app for iphone 4 are in turkish could you tell me how to change them to worldwide?

Creating a trending topic is the Holy Grail for Twitter users. Nothing says that you've become a big deal in the Twitterverse like having your very own hashtag scrolling across the Twitter login page. For businesses and public personalities who are serious about marketing with social media, making a trending topic is often the first thing on their to-do list. However, Twitter trends are highly variable. Whether or not your topic trends is ultimately a popularity contest. Nothing can guarantee a trend, but there are a few basic do's and don'ts when it comes to tweeting yourself to stardom.

  • Why do people conform with trends so easily? An example of this would be a few years ago everyone wanted an LG Cookie, then everyone wanted a BlackBerry and now everyone wants an Iphone. Like people will choose the more expensive, more popular item over one that does exactly the same thing and is cheaper.
  • What's with the Other: Category on my iPhone? Everytime I plug it into iTunes it goes up a little.yesterrday it was at 0.95 MB now its at 1.01 GB. Is there a way to make it go down other then having it restored? And also what makes up the "other" category on the iPhone?
  • What is the other category on my iPhone storage? When I connect my iPhone to my computer I see nearly 5.0GB of "other" in the storage. I only have a 16 GB iPhone so it's clearly a problem. What is this "other" and how can I fix the issue?
  • What is in the Other category on my iPhone storage? I have an iPhone 4 (not 4s), and when i plug it into my computer, it says there's 3.5gb of Other, but i don't know what's in this "Other" category. I cleared all my web history/cache/cookies, and deleted tons and tons of emails along with all my text conversations and recent calls, but that barely did anything. What else can i do to reduce the size of this category?