<?php 
// Sidenote
locate_template( array( "index.php" ) ); //locates the path to highest priority index.php

/* How to localize themes (functions.php) */
// 0.1. Add your .po & .mo files to the "languages" folder in your theme directory
// 0.2. Add the WPLANG paramater to wp-config.php

// 1. Load the textdomain
$path = STYLESHEETPATH.'/languages'; // If this is not a child theme, TEMPLATEPATH is sufficient 
//dirname( get_bloginfo('stylesheet_url') ) returns the url
load_theme_textdomain( 'textdomain', $path );

// 2. Internationalize the theme strings using __() or _e()
_e("Hello world", "textdomain");