Change language when button pressed Xcode - iphone

I want to make my app multi-language. I know how to do this.
But the problem is that, the user should first change the phones languages before the translation will work.
What I want to do is the following: I have 3 buttons. Dutch,English,French.
When a user presses a button. The language of the app is changed to the appropriate language. But the phone's language keeps the same.
Hope anyone can help me!
Kind regards

But the different translations into different files. Load the needed file according to the button the user touched.
If this does not answer your question, please be more specific what exactly you problem is.

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I have a problem and would appreciate it if you would help me.
I made a app from this tutorial:
http://www.lonhosford.com/lonblog/2011/05/08/xcode-4-iphone-tutorial-mountains-of-the-usa-overview/?fb_comment_id=fbc_10150196924999637_19584378_10150363736289637#f20e4d75c4
It works great, but i need it without the search button. I want to see all the data when i start the app... without taping on the search button or anything else.
I am in the learning process and it would help me a lot if someone would answer.
On the link you will find all the codes i used in the app.
Thanks a lot!!
David R.
remove the button from the interface and just call the method associated with the tap of the button from your viewDidLoad.

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In my app I want to provide option in dropdown box, I know there is no such thing in iPhone can I create dropdown box using available controllers? Please can anyone suggest me how I can achieve this?
Deepak, You can create a Drop down like control with a help of a UIButton and a UITableView indicating the drop down list. But for sure your application would be rejected by Apple.
Most of the iPhone users would be comfortable using a drop down box in an iPhone app, because people got used to Pickers .
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