TranslationHelper::createKeyHash() 

\nn\t3::TranslationHelper()->createKeyHash($param = ''); 

Generates a unique hash from the key that is required to identify a text. Each text has the same key in all languages.

$translationHelper->createKeyHash( '12345' );
$translationHelper->createKeyHash( ['my', 'key', 'array'] );

| @return string

public function createKeyHash( $param = '' ) {
	return md5(json_encode(['_'=>$param]));
}