Adding Style to Editor is not working

Hi there,

I’m trying to add Styles to the Editor but is not Working:

I’ve Version WordPress 5.2 active.

I tryed with adding to function.php the following:

/ Callback function to insert 'styleselect' into the $buttons array
function my_mce_buttons_2( $buttons ) {
	array_unshift( $buttons, 'styleselect' );
	return $buttons;
}
// Register our callback to the appropriate filter
add_filter( 'mce_buttons_2', 'my_mce_buttons_2' );

// Callback function to filter the MCE settings
function my_mce_before_init_insert_formats( $init_array ) {  
	// Define the style_formats array
	$style_formats = array(  
		// Each array child is a format with it's own settings
		array(  
			'title' => '.translation',  
			'block' => 'blockquote',  
			'classes' => 'translation',
			'wrapper' => true,
		)
	);  
	// Insert the array, JSON ENCODED, into 'style_formats'
	$init_array['style_formats'] = wp_json_encode( $style_formats );  
	
	return $init_array;  
  
} 
// Attach callback to 'tiny_mce_before_init' 
add_filter( 'tiny_mce_before_init', 'my_mce_before_init_insert_formats' );