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``language_name``
=================
The ``language_name`` filter returns the language name based on its ISO 639-1
code, ISO 639-2 code, or other specific localized code:
.. code-block:: twig
{# German #}
{{ 'de'|language_name }}
By default, the filter uses the current locale. You can pass it explicitly:
.. code-block:: twig
{# allemand #}
{{ 'de'|language_name('fr') }}
{# français canadien #}
{{ 'fr_CA'|language_name('fr_FR') }}
.. note::
The ``language_name`` filter is part of the ``IntlExtension`` which is not
installed by default. Install it first:
.. code-block:: bash
$ composer require twig/intl-extra
Then, on Symfony projects, install the ``twig/extra-bundle``:
.. code-block:: bash
$ composer require twig/extra-bundle
Otherwise, add the extension explicitly on the Twig environment::
use Twig\Extra\Intl\IntlExtension;
$twig = new \Twig\Environment(...);
$twig->addExtension(new IntlExtension());
Arguments
---------
* ``locale``: The locale code as defined in `RFC 5646`_
.. _RFC 5646: https://www.rfc-editor.org/info/rfc5646
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