WordPress at a glance
filter is not described

gettext filter-hook . WP 2.0.11

Filters text with its translation.

Usage

add_filter( 'gettext', 'filter_function_name_7342', 10, 3 );
function filter_function_name_7342( $translation, $text, $domain ){
	// filter...

	return $translation;
}
$translation(string)
Translated text.
$text(string)
Text to translate.
$domain(string)
Text domain. Unique identifier for retrieving translated strings.

Where the hook is called

translate()
wp-includes/l10n.php 182
return apply_filters( 'gettext', $translation, $text, $domain );

Where the hook is used (in WP core)

Does not used.