HTML pages code cleaning and layout ottimization using include php

We need HTML pages code cleaning and layout ottimization using include php Manage text with language selections (like example ) of attached html template. What need to be included in the pages ? - Header - Footer - Css - Javascript - Banner Code example: <?php $page = $_GET['p']; ?> <?php if ($page == '') { ?> <?php include("[login to view URL]"); ?> <?php } else { ?> <?php include("[login to view URL]"); ?> <?php if (!($page)) $page=""; $filename1="".$page.".php"; $filename2="".$page.".php"; if (file_exists($filename1)) { include($filename1); } else { if (file_exists($filename2)) { include($filename2); } else { include ("[login to view URL]"); } } ?> <?php include("[login to view URL]"); ?> <?php } ?> How manage languages ? (ITA – ENG) (example) <?php session_start();?> <?php ob_start(); ?> <?php require_once("script/[login to view URL]");?> <?php if(!isset($_GET['lang'])){$lang="it"; }else{$lang=$_GET['lang'];} if(($lang=="it") || ($lang=="")) { include("lingue/[login to view URL]"); } if($lang=="en") { include("lingue/[login to view URL]");} ?> Function to call language: (example) <span><?=$Traduci['selezioona_lingua']; ?></span> File language (example ) : <? // INGLESE // Block 01 $Traduci['selezioona_lingua'] = 'Select your language'; $Traduci['claim']="RELIABLE - METICULOUS - FAST"; $Traduci['main_text']='TF [login to view URL] is a young and dynamic company founded on <span class="bold">30 years of experience in the transport and logistics sector</span>.<br><br> As a medium-sized company we have a great deal of flexibility and can offer a wide range of services with various kinds of vehicles<br><br> <span class="important">Each client has their own dedicated representative and can monitor their services in real time</span>.'; $Traduci['main_text_claim']='Accesso<br><span class="medium">Clienti</span>'; // Block 02 $Traduci['servizi_espressi_dedicati']='DEDICATED EXPRESS SERVICES'; $Traduci['servizi_espressi_dedicati_text']='Delivery and pick-up services in Italy and Europe with only the time required for transit. The dedicated driver guarantees the utmost speed and care in carrying out the service.<br><br> <span class="important">All vehicles are equipped with a satellite system that allows us to monitor their progress in real time.</span>'; $Traduci['servizi_groupage_europa']='GROUPAGE EUROPA SERVICES'; // Block 03 $Traduci['servizi_distribuzione']='DISTRIBUTION SERVICES'; $Traduci['servizi_distribuzione_sub']='SPECIALIZED IN THE TRANSPORT OF ORTHOPAEDIC EQUIPMENT'; $Traduci['servizi_distribuzione_01']='Immediate delivery and pick-up'; $Traduci['servizi_distribuzione_02']='Delivery to the operating room'; $Traduci['servizi_distribuzione_03']='Delivery before 8 am'; $Traduci['servizi_distribuzione_04']='Triangular shipment'; $Traduci['servizi_distribuzione_05']='Scheduled delivery and pick-up'; Please note: Those code examples above are from other websites, please ignore the code, use yours. You have to create the English language file from a copy of the Italian one, we will translate it. We want clear and commented coding.