"read more" break text in spanish

If you are using the twentyten theme, there is a Spanish translation: http://wordpress.org/support/topic/twenty-ten-spanish-translation-traduccion-al-espanol.

If you only want to translate that one phrase and not the whole twentyten theme, then look for the function called twentyten_continue_reading_link in functions.php (about line 241) and change the text in there.

If you’re not using twentyten theme, try this (you’ll need to put it in your functions.php file and change REPLACE_ME for your Spanish text):

function spanish_continue_reading_link() {
	return ' <a href="'. get_permalink() . '">REPLACE ME &rarr;</a>';
}

add_filter( 'excerpt_more', 'spanish_auto_excerpt_more' );

function spanish_auto_excerpt_more( $more ) {
	return ' &hellip;' . spanish_continue_reading_link();
}

add_filter( 'get_the_excerpt', 'spanish_custom_excerpt_more' );

function spanish_custom_excerpt_more( $output ) {
	if ( has_excerpt() && ! is_attachment() ) {
		$output .= spanish_continue_reading_link();
	}
	return $output;
}