Internationalization

__.php

$name = __( 'My Stats', 'textdomain' );

_e.php

<h1><?php _e( 'My Stats', 'textdomain' ) ?></h1>

_n.php

$comment_count = get_comments_number();
$comment_count_text = _n( 'One Comment', 'Many Comments', $comment_count, 'textdomain' );

_x.php

<?php
$to_post = _x( 'Post', 'The action of creating a post', 'textdomain' );
$a_post = _x( 'Post', 'The name of a post type', 'textdomain' );
?>

<h1><?php _ex( 'Read Posts', 'Posts with a status of read', 'textdomain' ) ?></h1>
<a href="<?php echo get_permalink() ?>"><?php _ex( 'read post', 'Action of reading a post', 'textdomain' ) ?></a>

<?php
$read_count_text = _nx( 'One Read Posts', 'Many Read Posts', $read_count, 'Number of read posts', 'textdomain' );
?>

escape.php

<a href="<?php the_permalink() ?>" title="<?php sprintf( esc_attr_e( "Read %s In Full", 'textdomain' ), the_title_attribute( 'echo=false' ) ) ?>"><?php the_title() ?></a>

labels.php

	$labels = array(
		'name'               => _x( 'Books', 'post type general name', 'your-plugin-textdomain' ),
		'singular_name'      => _x( 'Book', 'post type singular name', 'your-plugin-textdomain' ),
		'menu_name'          => _x( 'Books', 'admin menu', 'your-plugin-textdomain' ),
		'name_admin_bar'     => _x( 'Book', 'add new on admin bar', 'your-plugin-textdomain' ),
		'add_new'            => _x( 'Add New', 'book', 'your-plugin-textdomain' ),
		'add_new_item'       => __( 'Add New Book', 'your-plugin-textdomain' ),
		'new_item'           => __( 'New Book', 'your-plugin-textdomain' ),
		'edit_item'          => __( 'Edit Book', 'your-plugin-textdomain' ),
		'view_item'          => __( 'View Book', 'your-plugin-textdomain' ),
		'all_items'          => __( 'All Books', 'your-plugin-textdomain' ),
		'search_items'       => __( 'Search Books', 'your-plugin-textdomain' ),
		'parent_item_colon'  => __( 'Parent Books:', 'your-plugin-textdomain' ),
		'not_found'          => __( 'No books found.', 'your-plugin-textdomain' ),
		'not_found_in_trash' => __( 'No books found in Trash.', 'your-plugin-textdomain' )
	);

load-textdomain.php

function myplugin_init() {
	$plugin_dir = basename(dirname(__FILE__));
	load_plugin_textdomain( 'my-plugin', false, $plugin_dir );
}
add_action('plugins_loaded', 'myplugin_init');

localize-script.js

$("#message").html( objectL10n.message );

localize-script.php

add_action( 'wp_enqueue_scripts', 'my_theme_scripts' );
function my_theme_scripts() {
	wp_enqueue_script( 'theme-script', get_template_directory_url() . '/js/theme-script.js' );
	wp_localize_script( 'theme-script', 'objectL10n', array(
		'message'  => __( 'Well Done', 'textdomain' ),
	) );
}

noop.php

$messages = array(
	'post' => _n_noop('%s post', '%s posts'),
	'page' => _n_noop('%s pages', '%s pages')
);
...
$message = $messages[$type];
$usable_text = sprintf( translate_nooped_plural( $message, $count, $domain ), $count );

sprintf-translate.php

$comment_count = get_comments_number();
$comment_count_text = sprintf( _n( 'One Comment', '%s Comments', $comment_count, 'textdomain' ), $comment_count );

sprintf.php

$name = 'Daniel';
echo sprintf( '%s says hello!', $name );

textdomain-comment.css

/*
Theme Name: Twenty Fifteen
Theme URI: https://wordpress.org/themes/twentyfifteen
Author: the WordPress team
Author URI: https://wordpress.org/
Description: Our 2015 default theme is clean, blog-focused, and designed for clarity. Twenty Fifteen's simple, straightforward typography is readable on a wide variety of screen sizes, and suitable for multiple languages. We designed it using a mobile-first approach, meaning your content takes center-stage, regardless of whether your visitors arrive by smartphone, tablet, laptop, or desktop computer.
Version: 0.1
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Tags: black, blue, gray, pink, purple, white, yellow, dark, light, two-columns, left-sidebar, fixed-layout, responsive-layout, accessibility-ready, custom-background, custom-colors, custom-header, custom-menu, editor-style, featured-images, microformats, post-formats, rtl-language-support, sticky-post, threaded-comments, translation-ready
Text Domain: twentyfifteen

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned with others.
*/