How to change itunes library?

1. Open iTunes.
2. From the upper-middle of iTunes, click iTunes Store.
3. Scroll down to the bottom of the main iTunes Store window. In the lower-right corner, click the country flag.
4. Click the country that matches the language you want the iTunes Store to use. The iTunes Store changes to the country and language you chose.

Note: Changing the language and country that you see in the iTunes Store doesn't mean that you can buy items in that country's store. Which country's store you can buy items from is determined by the billing address of your payment method.

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