ต้องทำยังไงค่ะ TCPDF ไม่เป็นภาษาไทย ลองใส่ฟ้อนไทยแล้วขึ้นช่องสี่เหลียม ต้องทำยังไงต่อดี

<?php
$user = 'sa';
$pass = 'xxxxxxxx';
$server = 'xxxxxxxx';
$database = 'xxxxx';
$connection_string = "DRIVER={SQL Server};SERVER=$server;DATABASE=$database;Client_CSet=UTF-8;"; 
$link = odbc_connect($connection_string,$user,$pass);

if ($link) {
   // echo "Connection established.";
} else{
    die("Connection could not be established.");
}

?>
<?php


// Include the main TCPDF library (search for installation path).


require_once('./lang/eng.php');
require_once('tcpdf_include.php');
 

// create new PDF document
$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false, true);
$html = 
$pdf=new TCPDF( 'P' , 'mm' , 'A4' );
$pdf->AddPage();


//$query = odbc_exec ($link,$sql);
//$row = odbc_fetch_array($query);
//echo $row['IO'];

$pdf->Image('form.png',5,10,230,305);

$y = 38;
$x = 26;
$id = $_GET['id'];
$sql = "select * From xxxx where ID = '$id' ";
$query = odbc_exec ($link,$sql);
while($row = odbc_fetch_array($query)){
	
	
	$pdf->SetFont('freeserif','',12);
	$pdf->Text( $x+153 , $y-13 ,$row['request_no']);
	
	
	$pdf->SetFont('freeserif','',12);
	$pdf->Text( $x , $y-2 ,date("d/m/Y",strtotime($row['create_date'])));
	
	
	

}

$pdf->Output();