How to change the Site Language in Joomla 2.5:
Site language is the most essential part in Joomla 2.5 as it by default comes with installed English language pack. Here you can change your site language that Joomla uses. So if your site is not intend for English speaking users then you can change your language in Joomla, predefined words and predictions, such as ‘login’ and ‘you are here’, will be converted to your choice of your own language. We’ll go through and show you the detailed process on how to change language in joomla 2.5.
Procedure to change the language in Joomla 2.5: