WordPress Tiny MCE - Change Language Attributes

editor_plugin.js

/*
 * plugin/tinymce/editor_plugin.js
 */

(function(){
    tinymce.PluginManager.requireLangPack('languages');
    tinymce.create('tinymce.plugins.languages', {
        createControl: function(n, cm){
            /*var list, listlang = {
                    'en': 'English',
                    'es': 'Spanish',
                    'fr': 'French'
                }, t = this;*/
            switch (n) {
                case 'languages':
                    var mlb = cm.createListBox('languages', {
                        title : optiontitle,
                        onselect : function(v){
                            var matches, formatNames = [];
                                var sel_txt = tinyMCE.activeEditor.selection.getContent();
                                tinyMCE.activeEditor.execCommand('mceInsertContent', false, '<span lang="' + v + '">' + sel_txt + '</span>');
                            return false;
                        }
                    });
                    for(var x in listlang) {
                        mlb.add(listlang[x], x);
                    }
                    return mlb;
                }
            return null;
        },
        getInfo: function() {
            return {
                longname: 	'TinyMCE Languages Change',
                author: 	'aquelito',
                authorurl: 	'http://aquelito.fr',
                infourl: 	'http://aquelito.fr',
                version: 	tinymce.majorVersion + "." + tinymce.minorVersion
            };
        },
    });
    tinymce.PluginManager.add('languages', tinymce.plugins.languages);
})();

en.js

/*
 * plugin/tinymce/langs/en.js
 */

tinyMCE.addI18n({ en: {
	tiny_languages: {
		desc : 'Languages'
	}
}});

fr.js

/*
 * plugin/tinymce/langs/fr.js
 */

tinyMCE.addI18n({ fr: {
	languages: {
		desc : 'Langues',
	}
}});

plugin.php

<?php

/*
Plugin Name: Change Language Attributes
Plugin URI: http://github.com/aquelito
Description:  Tiny MCE - Change Language Attributes
Author: aquelito
Version: 1.0
Author URI: http://aquelito.fr
License: GPLv2 or later
*/

/*
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

class PluginLanguageAttributes {
    
    const LANG = 'PluginLanguageAttributes';
    
	function __construct() {
        
        load_plugin_textdomain(self::LANG, false, dirname(plugin_basename( __FILE__ ) ) . '/languages/');
        
        $this->advanced_buttons = array(
            'theme_advanced_buttons1' => 'bold,italic,strikethrough,|,bullist,numlist,blockquote,|,sub,sup,|,justifyleft,justifycenter,justifyright,|,link,unlink,|,spellchecker,fullscreen,wp_adv',
            'theme_advanced_buttons2' => 'abbreviation,languages,styleselect,formatselect,underline,forecolor,|,pastetext,pasteword,removeformat,|,charmap,|,outdent,indent,|,undo,redo,wp_help',
        );
        
        $this->advanced_blockformats = 'p,h2,h3,h4,div,h5,h6,pre,code,samp';
        
        $this->langs_formats = array(
            'en' => __("English", self::LANG),
            'es' => __("Spanish", self::LANG),
            'it' => __("Italian", self::LANG),
            'fr' => __("French", self::LANG),
            'de' => __("German", self::LANG)
        );
        
        $this->langs_spellchecker = array(
            'fr' => '+'.__("French", self::LANG),
            'en' => __("English", self::LANG)
        );
        
        $this->style_formats = array(
            //array( 'title' => __('Red text', self::LANG),           'inline' => 'span', 'styles' => array('color' => '#ff0000')),
            array( 'title' => __('Align Left', self::LANG),         'block' => 'p', 'classes' => 'aleft' ),
            array( 'title' => __('Align Center', self::LANG),       'block' => 'p', 'classes' => 'acenter' ),
            array( 'title' => __('Align Right', self::LANG),        'block' => 'p', 'classes' => 'aright' ),
            array( 'title' => __('Typography Style', self::LANG) ),
            array( 'title' => __('Highlight', self::LANG),          'inline' => 'span', 'classes' => 'highlight' ),
            array( 'title' => __('Caps', self::LANG),               'inline' => 'span', 'classes' => 'caps' ),
            array( 'title' => __('Small-caps', self::LANG),         'inline' => 'span', 'classes' => 'small-caps' ),
            array( 'title' => __('No-caps', self::LANG),            'inline' => 'span', 'classes' => 'no-caps' ),
            array( 'title' => __('Regular', self::LANG),            'inline' => 'span', 'classes' => 'regular' ),
            array( 'title' => __('Bold', self::LANG),               'inline' => 'span', 'classes' => 'bold' ),
            array( 'title' => __('Italic', self::LANG),             'inline' => 'span', 'classes' => 'italic' ),
            array( 'title' => __('Underline', self::LANG),          'inline' => 'span', 'classes' => 'underline' ),
            array( 'title' => __('Strike', self::LANG),             'inline' => 'span', 'classes' => 'strike' ),
            array( 'title' => __('Alignement', self::LANG) ),
            array( 'title' => __('Float Left', self::LANG),         'block' => 'p', 'classes' => 'alignleft' ),
            array( 'title' => __('Float Right', self::LANG),        'block' => 'p', 'classes' => 'alignright' ),
        );
        
        add_action('plugins_loaded', array($this, 'admin_plugins_loaded'));
    }
    
    public function admin_plugins_loaded () {
        if( is_admin() && current_user_can('edit_posts' ) &&
            current_user_can('edit_pages') && get_user_option('rich_editing') == 'true') {
            $this->admin_hooks();
        }
    }
    
    private function admin_hooks() {
        add_filter( 'tiny_mce_before_init', array(&$this, 'editor_before_init') );
        add_filter( 'mce_external_plugins', array(&$this, 'editor_external_plugins') );
        add_action( 'admin_head', array(&$this, 'editor_header_var') );
    }
    
    public function editor_before_init( $settings ) {
        
        // advanced_buttons_bars
        foreach($this->advanced_buttons as $key => $value) {
            $settings[$key] = $value;
        }
        
        // advanced_blockformat
        $settings['theme_advanced_blockformats'] = $this->advanced_blockformats;
        
        // spellchecker
        foreach($this->langs_spellchecker as $lkey => $lvalue) {
            $r[] = $lvalue.'='.$lkey.'';
        }
        $settings['spellchecker_languages'] = join(', ', $r);
        
        $settings['style_formats'] = json_encode( $this->style_formats );
        return $settings;
    }
    
    public function format_string( $array, $inn = ':', $sep = ', ') {
        foreach($array as $lkey => $lvalue)  {
            $output[] = '"'.$lkey.'"'.$inn.'"'.$lvalue.'"';
        }
        return join($sep, $output);
    }
    
    public function editor_external_plugins($plugin_array) {
        $plugin_array['languages'] = plugins_url('/tinymce/editor_plugin.js', __FILE__ );
        return $plugin_array;
    }
    
    public function editor_header_var(){
        foreach($this->langs_formats as $key => $value)  {
            if($key != substr(WPLANG, 0, 2) )
                $output[] = $key.':"'.$value.'"';
        }
        echo '<script type="text/javascript">var optiontitle = "'.__('Languages', self::LANG).'", listlang = {'. join(', ', $output) .'}</script>';
    }
}
$PluginLanguageAttributes = new PluginLanguageAttributes();