Facebook instant articles

Question

The Facebook page shows characters as ???? for certain WordPress posts shared.

I did check the preview for Facebook Instant Articles for posts. It shows the same. This only happens to certain posts.

I have also added following in header.

 <meta charset="UTF-8" />
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

I did also checked https://MYDOMAINAME/feed/instant-articles. There it shown correctly.

Answer 1

try finding the language and maybe if it is thai this would work:

<meta http-equiv="Content-Language" content="th">
<meta http-equiv="Content-Type" content="text/html; charset=windows-874">

EDIT: maybe if one of the characters isn't in the charset it would be unreadable. make sure you implement the right charset.