wp-includes/l10n/class-wp-translations.php:139Translates a singular string.
$singularstring|null$contextstring|nulloptional''string|null public function translate( $singular, $context = '' ) { if ( null === $singular ) { return null; } $translation = $this->controller->translate( $singular, (string) $context, $this->textdomain ); if ( false !== $translation ) { return $translation; } // Fall back to the original. return $singular; }Introduced in 6.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/l10n/class-wp-translations.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.