Modify text strings in WordPress

functions.php

<?php


//* Modify text strings
//* Hat-tip: http://speakinginbytes.com/2013/10/gettext-filter-wordpress/
function dw_text_strings( $translated_text, $text, $domain ) {
    switch ( $translated_text ) {
        case 'Related Products' :
            $translated_text = __( 'More T-Shirts', 'woocommerce' );
            break;
    }
    return $translated_text;
}