Error: "?" in pdf templates

Hello,

Is there any one who can help me with my issue. Problem which I have is when I generate an invoice or any other document in pdf for order/shipment, because of translation on my language I get this “?” instead of letters. Can someone tell me where can I change/fix it. Thanks!

You might change the PDF font ,
Setup->Other Setup
Add Name “MAIN_PDF_FORCE_FONT” , Value “msungstdlight” or other font fit your requirement.