Has the Thai-to-English course been abandoned?
I've written this post in the main Duolingo forum on the matter:
I'm trying to push for Duolingo to accept me as a course contributor. So if you feel frustrated that the course hasn't been responding to your feedback on various mistakes and issues you've spotted, please show your support by adding your voice onto that or this thread.
It can be as simple as replying with:
"I support Gurce in becoming a course contributor!"