wp-includes/pomo/translations.php:494Translates a singular string.
$singularstring$contextstringoptionalnull public function translate( $singular, $context = null ) { return $singular; }Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/pomo/translations.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.