--TEST--
"language_name" filter
--TEMPLATE--
{{ 'UNKNOWN'|language_name }}
{{ null|language_name }}
{{ 'de'|language_name }}
{{ 'fr'|language_name }}
{{ 'de'|language_name('fr') }}
{{ 'fr'|language_name('fr_FR') }}
{{ 'fr_CA'|language_name('fr_FR') }}
--DATA--
return [];
--EXPECT--
UNKNOWN

German
French
allemand
français
français canadien
