gistfile1.php

<?php
/*
Plugin Name: Just Give Me Berlin.
Plugin URI: http://www.berlin.de/en/
Description: Berlin. Nuff said.
Author: A Berliner
Author URI: http://www.findme.in/berlin
Version: 0.0
*/

function berlin_replace( $text ) {
	$search = array(
		'תל אביב',
		'ירושלים',
		'באר שבע',
		'חיפה',
		'ראשון לציון',
		'אשדוד',
		// ....
		'ירוחם', // WAT?
	);
	
	return str_replace( $search, 'ברלין', $text );
}

foreach ( array( 'the_content', 'the_title', 'wp_title' ) as $filter )
	add_filter( $filter, 'berlin_replace' );