Change submit notice language

Hey there,

is there any possibility to change the language of the submit notice?
(Form has been successfully submitted. Thank you.)

I want to use the plugin on a german website and I need this notice to be in german.
I’ve already tried this code snippet:

add_filter( 'caldera_forms_render_notices', function( $notices ){
	//Will ONLY be set (during AJAX return) if there is no error
	if( isset( $notices[ 'error' ], $notices[ 'error' ][ 'sucess' ] ) ){
		$notices[ 'error' ][ 'sucess' ] = 'That was awesome!';
	}
	return $notices;
  
});

… but this didn’t work.

Any other ideas?

Thanks in advance!

Viktoria