$args
Some servers don't allow PHP to check the rewrite, so try via AJAX.
Can "translate" language keys into various human-readable, localized strings.
Language class to ensure only valid languages are used.
if($container instanceof ElggGroup &&$container->guid!=elgg_get_page_owner_guid()) $key
translate($key, array $args=[], Locale $locale=null)
Given a message key, returns a best-effort translated string.