Wordpress: custom post wrapper class for "register_post_type" function.

CustomPost.php

<?php namespace PaintedCloud\WP\Classes;

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

class CustomPost {

  protected $textdomain;
  protected $posts;

	public function __construct( $textdomain )
	{
		// Initialize text domain
		$this->textdomain = $textdomain;
		
		// Initialize the posts array
		$this->posts = array();

		// Add the action hook calling the register_custom_post method
		add_action('init', array(&$this, 'register_custom_post'));
	}

	public function make( $type, $singular_label, $plural_label, $settings = array() )
	{
		
		// Define the default settings
		$default_settings = array(
			'labels' => array(
				'name' => __($plural_label, $this->textdomain),
				'singular_name' => __($singular_label, $this->textdomain),
				'add_new_item' => __('Add New '.$singular_label, $this->textdomain),
				'edit_item'=> __('Edit '.$singular_label, $this->textdomain),
				'new_item'=>__('New '.$singular_label, $this->textdomain),
				'view_item'=>__('View '.$singular_label, $this->textdomain),
				'search_items'=>__('Search '.$plural_label, $this->textdomain),
				'not_found'=>__('No '.$plural_label.' found', $this->textdomain),
				'not_found_in_trash'=>__('No '.$plural_label.' found in trash', $this->textdomain),
				'parent_item_colon'=>__('Parent '.$singular_label, $this->textdomain),
				),
			'public'=>true,
			'has_archive' => true,
			'menu_position'=>20,
			'supports'=>array(
				'title',
				'editor',
				'thumbnail'
				),
			'rewrite' => array(
				'slug' => sanitize_title_with_dashes($plural_label)
				)
			);

		// Override any settings provided by user
		// and store the settings with the posts array
		$this->posts[$type] = array_merge($default_settings, $settings);

	}

	public function register_custom_post()
	{
		// Loop through the registered posts
		// and register all posts stored in the array
		foreach($this->posts as $key=>$value) {
			register_post_type($key, $value);
		}
	}

}

You should use sprintf function for the internationalization of the labels, like so:

'add_new_item' => sprintf( __( 'Add New %s', $this->textdomain ), $singular_label ),
'edit_item' => sprintf( __( 'Edit %s', $this->textdomain ), $singular_label ),
'new_item' => sprintf( __( 'New %s', $this->textdomain ), $singular_label ),
'view_item' => sprintf( __( 'View %s', $this->textdomain ), $singular_label ),
'search_items' => sprintf( __( 'Search %s', $this->textdomain ), $plural_label ),
'not_found' => sprintf( __( 'No %s found', $this->textdomain ), $plural_label ),
'not_found_in_trash' => sprintf( __( 'No %s found in trash', $this->textdomain ), $plural_label ),
'parent_item_colon' => sprintf( __( 'Parent %s', $this->textdomain ), $singular_label ),