MediaWiki/languages/classes/LanguageEn.php

<?php
/**
 * English specific code.
 *
 * 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.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

/**
 * @ingroup Language
 */
class EnConverter extends LanguageConverter {
	/**
	 * Dummy methods required by base class.
	 */
	function loadDefaultTables() {
		$this->mTables = [
			'en' => new ReplacementArray(),
			'en-x-piglatin' => new ReplacementArray(),
		];
	}

	/**
	 * Translates text into Pig Latin. This allows developers to test the language variants
	 * functionality and user interface without having to switch wiki language away from default.
	 *
	 * @param string $text
	 * @param string $toVariant
	 * @return string
	 */
	function translate( $text, $toVariant ) {
		if ( $toVariant === 'en-x-piglatin' ) {
			// Only process words composed of standard English alphabet, leave the rest unchanged.
			// This skips some English words like 'naïve' or 'résumé', but we can live with that.
			// Ignore single letters and words which aren't lowercase or uppercase-first.
			return preg_replace_callback( '/[A-Za-z][a-z\']+/', function ( $matches ) {
				$word = $matches[0];
				if ( preg_match( '/^[aeiou]/i', $word ) ) {
					return $word . 'way';
				} else {
					return preg_replace_callback( '/^(s?qu|[^aeiou][^aeiouy]*)(.*)$/i', function ( $m ) {
						$ucfirst = strtoupper( $m[1][0] ) === $m[1][0];
						if ( $ucfirst ) {
							return ucfirst( $m[2] ) . lcfirst( $m[1] ) . 'ay';
						} else {
							return $m[2] . $m[1] . 'ay';
						}
					}, $word );
				}
			}, $text );
		} else {
			return $text;
		}
	}
}

/**
 * English
 *
 * @ingroup Language
 */
class LanguageEn extends Language {
	function __construct() {
		global $wgUsePigLatinVariant, $wgHooks;

		parent::__construct();

		if ( $wgUsePigLatinVariant ) {
			$this->mConverter = new EnConverter( $this, 'en', [ 'en', 'en-x-piglatin' ] );
			$wgHooks['PageContentSaveComplete'][] = $this->mConverter;
		}
	}
}