Follow this Link: Android : translate the language of whole app on click
Then Do like this, Add the string values for each locale into the appropriate file.
English (default locale), /values/strings.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="title">My Application</string>
<string name="hello_world">GoodMorning</string>
</resources>
Tamil, /values-tl/strings.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="title">My Application</string>
<string name="hello_world">Kaalai vanakkam</string>
</resources>
Link: http://developer.android.com/training/basics/supporting-devices/languages.html