OCR Processing Issues with Thai language

OCR Processing Issues with Thai language.

I'm follow this medium url to get the OCR Processing convert PDF to searchable by using MS Automate
https://medium.com/adobetech/make-pdfs-searchable-ocr-after-importing-into-sharepoint-1a8037744841

OCR Processing have issues with Thai language , it can split the word but the value is not correct for example the word “กรรมการ” the result of this text is “f1jjlJf11j” 

Do i have to do some extra config or maybe i missed something? or it's just a Adobe PDF Services Connector not support Thai language