How to get the default frontend language

Question

As the title says, how can I get the default language of my website?

For example, I have Farsi & English language in my website, and Farsi is my default language (but maybe sometimes I want to change it to English).

How can I find out which one is the default one?

Answer 1

The default language is stored as a parameter in the language component. So you can use this to get the default language: JComponentHelper::getParams('com_languages')->get('site');.

For the backend language it would be JComponentHelper::getParams('com_languages')->get('administrator');

Answer 2

In Joomla 4:

use Joomla\CMS\Component\ComponentHelper;

$defaultFrontendLanguage = ComponentHelper::getParams('com_languages')->get('site');

$defaultBackendLanguage = ComponentHelper::getParams('com_languages')->get('administrator');

$defaultFrontendLanguage could be a language label like "en-GB";